because everybody else is doing it...

and because the identity and future fate seem so very probable:

How will you be suspended from LJ? by Anonymous LJ User
Username
Years on LJ
Snape	HotNot
Hours left until your suspension	9
Your crime	Mistaken identity. Your name was too similar to a porn queen BNF.
Who reported you	dawndeline
Your fate	Standing on street corners with a sign "will write Harry Potter porn for food".