Facebook with PII censored.

custom.css

/* People’s names. */
span > a[data-hovercard^="/ajax/hovercard/user.php?"], /* poster and shares */
.UFICommentActorName, /* comments */
.UFICommentBody .profileLink /* inside comments */
{
  background-color: currentColor;
}

/* People’s avatars. */
a[data-hovercard^="/ajax/hovercard/user.php?"] > div > img._s0, /* poster */
a[data-hovercard^="/ajax/hovercard/user.php?"] > img._s0, /* e.g. in shared posts */
a[data-hover="tooltip"] > img._s0, /* on shared thingies??? */
.UFIActorImage /* comments */
{
  visibility: hidden;
}

/* Bring back the user’s own info. */
div[id^="addComment_"] .UFIActorImage
{
  visibility: visible;
}

/* Hide names from number of likes. */
._2x4v > ._1g5v + ._4arz
{
  visibility: hidden;
}