When will he stop? This is the question of the hour as blogger Perez Hilton--whose real name is Mario Lavandeira--has hit the notoriety high point by being sued by Universal Studios for posting a topless picture of Jennifer Aniston on his site.

As we've already reported, the blogger was served with a $7.6 million copyright infringement suit for illegally using pictures taken by Los Angeles photo agency X17 in December. He laughed that one off--refusing comment.

But this time, it's not the paparazzi that are after him, and he's taking cover. His attorney Bryan Freedman was quoted stating that the picture was posted for "for the purpose of commentary and satire" and therefore constitutes fair use. And to his credit, Hilton did take the picture down.

The half-naked photo of Aniston was apparently captured during filming of her lukewarm pic The Break-Up which co-starred Vince Vaughn. The image never appeared in the actual film.

Bloggers occupy a strange space between journalists and private individuals--this has worked in Perez Hilton's favor as the outrage against his catty attacks grows. But it could also turn out to be his weakness. He isn't protected by an army of lawyers the way a journalist at a big media company is.

This is part of what gives him the freedom to write as nastily as he does--apparently he has dubbed Aniston with the unflattering moniker "Maniston"--but it also means he could be wide open to lawsuits if he raises enough hackles in Hollywood.