EL EM GEE Docs - Bookmarklet

tachankify_docs_bookmarklet.js

javascript:(function(){
var new_name="Anonymous Tachanka";
var chanka_pic="https://i.imgur.com/ZERv1w1.jpg";
var all_divs=document.querySelectorAll(".docs-presence-plus-collab-widget-container.goog-inline-block.docs-presence-plus-collab-widget-focus");
for(var i=0;i<all_divs.length;i++){
	all_divs[i].setAttribute("data-tooltip",new_name);
	all_divs[i].setAttribute("aria-label",new_name);
	var img=all_divs[i].querySelector("img");
	if(img!=null){img.setAttribute("src",chanka_pic);
	img.setAttribute("alt",new_name);}
}
}());

Copy pasta into URL section of bookmark
Tested in Chrome