Judging by their username and a glance through their comments, I'm going to guess that this person has dissociative identity disorder and is using the signature to note which alter made the comment. Definitely a bit jarring though, and maybe I'm wrong and it's just an odd quirk with how they comment.

Not weirder than going around and taking pictures of peoples butts, douchebag. ~Strawberry

Hm? ~Strawberry