Or your own. Because you will be caught, and it will end badly. Just ask Adam Curry.
Thomas Hawk just busted someone with a Yahoo IP address making anti-Zooomr (a Flickr competitor) and pro-Flickr edits to various articles in Wikipedia. While we don’t know the whole truth about what happened here, and likely never will, the appearance of evil is there, and that’s a hard shadow to get out from under.
So, be smart about your Wikipedia edits – they could come back to haunt you. This is why I’ve never tried to create a Wikipedia page about myself, and I’ve never edited any Intel-related articles. 😉