Slashdot

Livejournal have introduced a new feature whereby a user can send (for free) a "v-gift" consisting of one of three pictures containing a prominent Pepsi logo to any other user. This image is then displayed in a prominent location on the recipient's profile page - more prominent than the user's actual profile information, which can end up pushed off the screen if enough are received. Since each account can send 10 per week and account creation is easy, this gives an effective way of harassing other users.

As far as I can tell, there's no way of blocking v-gifts or requiring that they be approved before they're shown, though they can be deleted by the recipient. This is probably why the profile of the official "news" journal used by Livejournal to make announcements is currently full of v-gifts. Needless to say, if you want to keep your blog or journal even slightly professional in appearance, Livejournal is not a good place to host it (if it ever was).