Mysterious Facebook Code

var org_str = "j8ck72di";
var session_str = "4734a9fc27f7fee1aa58f66046af6c49";
var base_str = "https://ct-m-fbx.fbsbx.com/fp";
var page_id = "1";
var ip_addr_str = "820139e7306525d7";
var tarpitting_param = "";
var carrier_id_enabled = "false";
var flash_tags = "true";

var xx0=unescape('var%20thm_tags%3d%7binjectIframe%3afunction%28org_id%2csession_id%2cpage_id%29%7bvar%20dom%2cdoc%2cwhere%2ciframe%3ddocument%2ecreateElement%28%27iframe%27%29%3biframe%2esrc%3d%22javascript%3afalse%22%3b%28iframe%2eframeElement%7c%7ciframe%29%2estyle%2ecssText%3d%22width%3a100px%3bheight%3a100px%3bborder%3a0%3bposition%3aabsolute%3btop%3a%2d5000px%3b%22%3bwhere%3ddocument%2egetElementById%28%22thm_iframe_loc%22%29%3bif%28%21where%29%7bdocument%2ebody%2eappendChild%28iframe%29%3b%7delse%7bwhere%2eparentNode%2einsertBefore%28iframe%2cwhere%29%3b%7dtry%7bdoc%3diframe%2econtentWindow%2edocument%3b%7dcatch%28e%29%7bdom%3ddocument%2edomain%3biframe%2esrc%3d%22javascript%3avar%20d%3ddocument%2eopen%28%29%3bd%2edomain%3d%27%22%2bdom%2b%22%27%3bvoid%280%29%3b%22%3btry%7bdoc%3diframe%2econtentWindow%2edocument%3b%7dcatch%28e%29%7biframe%2esrc%3dbase_str%2b%22%2ftags%3fjs%3d1%26org_id%3d%22%2borg_id%2b%22%26session_id%3d%22%2bsession_id%2b%22%26pageid%3d%22%2bpage_id%3breturn%3b%7d%20%7ddoc%2eopen%28%29%2e_l%3dfunction%28%29%7bif%28typeof%20this%2ereadyState%3d%3d%3d%22undefined%22%7c%7ctypeof%20this%2ereadyState%3d%3d%3d%22unknown%22%29%7bthis%2ereadyState%3d%22complete%22%3b%20%7dif%28dom%29%7bthis%2edomain%3ddom%3b%7dvar%20divx%2cparam1%2cparam2%2cobj%2cswf_url%2cwin%2cimg%2cjs%2cu%2cp%2cdiv%3dthis%2ecreateElement%28%27p%27%29%3bthis%2ebody%2eappendChild%28div%29%3bdiv%2estyle%2ebackground%3d%22url%28%22%2bbase_str%2b%22%2fclear%2epng%3forg_id%3d%22%2borg_id%2b%22%26session_id%3d%22%2bsession_id%2b%22%26m%3d1%26w%3d%22%2bip_addr_str%2btarpitting_param%2b%22%29%22%3bimg%3dthis%2ecreateElement%28%22img%22%29%3bimg%2esrc%3dbase_str%2b%22%2fclear%2epng%3forg_id%3d%22%2borg_id%2b%22%26session_id%3d%22%2bsession_id%2b%22%26m%3d2%22%2btarpitting_param%3bthis%2ebody%2eappendChild%28img%29%3bjs%3dthis%2ecreateElement%28%22script%22%29%3bjs%2esrc%3dbase_str%2b%22%2fcheck%2ejs%3forg_id%3d%22%2borg_id%2b%22%26session_id%3d%22%2bsession_id%2btarpitting_param%2b%22%26pageid%3d%22%2bpage_id%3bthis%2ebody%2eappendChild%28js%29%3bif%28carrier_id_enabled%3d%3d%3d%22true%22%29%20%7bvar%20ciddoc%2ccidframe%3ddocument%2ecreateElement%28%22iframe%22%29%3bcidframe%2esrc%3d%22javascript%3afalse%22%3b%28cidframe%2eframeElement%7c%7ccidframe%29%2estyle%2ecssText%3d%22width%3a100px%3bheight%3a100px%3bborder%3a0%3bposition%3aabsolute%3btop%3a%2d5000px%3b%22%3bdocument%2ebody%2eappendChild%28cidframe%29%3btry%7bciddoc%3dcidframe%2econtentWindow%2edocument%3b%7dcatch%28e%29%7bcidframe%2esrc%3d%22javascript%3avar%20d%3ddocument%2eopen%28%29%3bd%2edomain%3d%27%22%2bdocument%2edomain%2b%22%27%3bvoid%280%29%3b%22%3bciddoc%3dcidframe%2econtentWindow%2edocument%3b%7dciddoc%2eopen%28%29%2e_l%3dfunction%28%29%7bvar%20cidscript%3dthis%2ecreateElement%28%22script%22%29%3bcidscript%2esrc%3dbase_str%2b%22%2fcheckcid%2ejs%3forg_id%3d%22%2borg_id%2b%22%26session_id%3d%22%2bsession_id%3bthis%2ebody%2eappendChild%28cidscript%29%3b%7d%3bciddoc%2ewrite%28%27%3cbody%20onload%3d%22document%2e_l%28%29%3b%22%3e%27%29%3bciddoc%2eclose%28%29%3b%7dif%28flash_tags%3d%3d%3d%22true%22%29%20%7bu%3dnavigator%2euserAgent%2etoLowerCase%28%29%3bp%3dnavigator%2eplatform%2etoLowerCase%28%29%3bwin%3dp%3f%2fwin%2f%2etest%28p%29%3a%20%2fwin%2f%2etesft%28u%29%3btry%7bie%3d%21%2b%22%5cv1%22%3bif%28%21ie%29%7bie%3d%2f%2a%40cc_on%21%40%2a%2ffalse%3b%7d%20%7dcatch%28e%29%7b%7dif%28%21ie%29%7bie%3d%28navigator%2euserAgent%2eindexOf%28%27MSIE%27%29%3e%20%2d1%29%3b%7dswf_url%3dbase_str%2b%22%2ffp%2eswf%3forg_id%3d%22%2borg_id%2b%22%26session_id%3d%22%2bsession_id%2btarpitting_param%3bif%28ie%26%26win%29%7bdivx%3dthis%2ecreateElement%28%22div%22%29%3bdivx%2einnerHTML%3d%27%3cobject%20type%3d%22application%2fx%2dshockwave%2dflash%22data%3d%22%27%2bswf_url%2b%27%22width%3d%221%22height%3d%221%22%3e%3cparam%20name%3d%22movie%22value%3d%22%27%2bswf_url%2b%27%22%2f%3e%3cparam%20name%3d%22wmode%22value%3d%22transparent%22%2f%3e%3c%2fobject%3e%27%3bthis%2ebody%2eappendChild%28divx%29%3b%7delse%7bobj%3dthis%2ecreateElement%28%27object%27%29%3bobj%2esetAttribute%28%22type%22%2c%22application%2fx%2dshockwave%2dflash%22%29%3bobj%2esetAttribute%28%22data%22%2cswf_url%29%3bobj%2esetAttribute%28%22width%22%2c%221%22%29%3bobj%2esetAttribute%28%22height%22%2c%221%22%29%3bparam1%3dthis%2ecreateElement%28%27param%27%29%3bparam1%2esetAttribute%28%22name%22%2c%22movie%22%29%3bparam1%2esetAttribute%28%22value%22%2cswf_url%29%3bparam2%3dthis%2ecreateElement%28%27param%27%29%3bparam2%2esetAttribute%28%22name%22%2c%22wmode%22%29%3bparam2%2esetAttribute%28%22value%22%2c%22transparent%22%29%3bobj%2eappendChild%28param1%29%3bobj%2eappendChild%28param2%29%3bthis%2ebody%2eappendChild%28obj%29%3b%7d%20%7d%7d%3bdoc%2ewrite%28%27%3cbody%20onload%3d%22document%2e_l%28%29%3b%22%3e%27%29%3bdoc%2eclose%28%29%3b%7d%2cgo%3afunction%28%29%7bif%28session_str%26%26org_str%29%7bvar%20isWebkit%3d%27WebkitAppearance%27in%20document%2edocumentElement%2estyle%3bif%28document%2ebody%26%26%28document%2ereadyState%3d%3d%3d%27complete%27%7c%7c%21isWebkit%29%29%7bthis%2einjectIframe%28org_str%2csession_str%2cpage_id%29%3breturn%3b%7dvar%20waittime%3d200%3bvar%20node%3bif%28typeof%20window%21%3d%3d%22undefined%22%26%26typeof%20window%21%3d%3d%22unknown%22%26%26window%21%3d%3dnull%29%7bnode%3dwindow%3b%7delse%7bnode%3ddocument%2ebody%3b%7dif%28node%2eaddEventListener%29%7bnode%2eaddEventListener%28%22load%22%2cfunction%28%29%7bthm_tags%2einjectIframe%28org_str%2csession_str%2cpage_id%29%3b%7d%2cfalse%29%3b%7delse%7bif%28node%2eattachEvent%29%7bnode%2eattachEvent%28%22onload%22%2cfunction%28%29%7bthm_tags%2einjectIframe%28org_str%2csession_str%2cpage_id%29%3b%7d%29%3b%7delse%7bvar%20oldonload%3dnode%2eonload%3bnode%2eonload%3dnew%20function%28%29%7bvar%20r%3dtrue%3bif%28oldonload%21%3d%3dnull%26%26typeof%20oldonload%3d%3d%3d%22function%22%29%7br%3doldonload%28%29%3b%7dsetTimeout%28function%28%29%7bthm_tags%2einjectIframe%28org_str%2csession_str%2cpage_id%29%3b%7d%2cwaittime%29%3bnode%2eonload%3doldonload%3breturn%20r%3b%7d%3b%7d%20%7d%7d%20%7d%7d%3bthm_tags%2ego%28%29%3b%20');eval(xx0);

Contacted Facebook about this years ago, and received prebaked "We appreciate your feedback" response.