The next time you have to choose an avatar for a social network or forum, avoid selecting your favorite Homer Simpson or Jack Sparrow avatar. Or you may well get into trouble.
Mephisto, a member of a poker site, used a Takashi Murakami image as an 80×70 pixel avatar on the site’s forum. Murakami responded with an email asking the user to either pay up 50,000 Yen (500$) or stop using the avatar.
On a related note, if you are looking to create a cool looking custom avatar, build one from scratch at Yahoo! Avatars or MiiWare.