Don't take it personally, if you look at their profiles, you'll see they're going from meme to meme to meme to meme as they come out of the chute, doing damage control.
In some cases, yes, if they see them on a daily basis from a particular individual, they will target them en masse and look them up everyday.
I almost feel sorry for them, because they post more in 15 minutes than I do all day, and I'm here all day! Of course, I post, go elsewhere, come back, and all over again, but still, day after day year after year... How could they not get bored with it already, doing the same thing over and over again? They'll even post on memes where the OP's never comment at all. On anything. What's the point of that?