I have also suddenly been receiving lots of likes out of the blue, sometimes on very old posts, for no apparent reason, which I also thought was strange. I haven’t seen anything strange in the actual ‘like’ — I don’t even know how that would work — but now that I’ve gone back and looked at some of the associated profiles, they all have the same kind of message in their profiles. But even more strangely, they have older ‘Member Since’ dates. The profiles I’ve found so far are: