This MySpace FAQ is hilarious:

In order to verify your identity, please send us a "salute". This means we will need an image of yourself holding a handwritten sign with the word "MySpace.com" and your Friend ID (your Friend ID number appears immediately after "friendID=" in the web address/URL when viewing your profile). We can then remove the profile that uses your identity without your permission.

I was surprised at this particularly onerous process for verifying identity, but then I checked the "create a profile" page and it said to look in a mirror before you create a profile to ensure that you are the right person.

Via Kim Cameron’s blog.