flagging comments link

me too, just looking for a solution to this.

Can we add a flag to comments too?

ok, I just found, by looking at the code, that the link is hidden for your own content

line 368: abuse.module

  if ($object && $user && $user->uid == $object->uid) {
    // Don't want user to flag their own content
    return $$links;
  }

you could show the link on user's content too with :

  if ($object && $user && $user->uid == $object->uid) {
    // Don't want user to flag their own content
    //return $$links; // disabled to show links on user's content too
  }