It is becoming the new "fad" in the forums.
Its against the rules to say in a thread "+Rep me if you like it" or telling the readers to give them rep for the thread.
I see more and more people having in their forum signatures "Give +Rep to threads you like". When I find this no different then saying "Give +Rep to thread you like" at the bottom of a thread. They are implying the same thing just wording it differently so they don't get into trouble.
It is just a loop hole people have found. And I believe it shouldn't be allowed.
Maybe I am just being picky or it's not a problem. But I figured I would suggest it and maybe bring it to attention.