Everyone is justified in being upset about this, but you need to be realistic. People don't have as much power with Facebook, Twitter accounts as they think they do. I could be wrong, but I don't believe Any social networking sites claims rights to your online information. To be sure you have to check the security agreement we all "OK" when we join a site. This part is CRITICAL to understand:
Anything you post online becomes "public domain." It means that by posting it, you are OKing anyone who wants to copy it and reproduce it whenever and however they want. Don't want picture of your kids spread around? Then don't post them Otherwise the best way to control it is to ensure yours and your child's profiles are "Private" or that any information is visible only to "Friends"
The last setting is critical, otherwise "Friends of Friends" can view your pictures through someone else's account.
Also beware of people tagging themselves on your pictures because that is another way for people you don't know to instantly see your pictures on some creep's account. Here is one example:
http://www.facebook.com/cstoecker1
The USASF Parent Action Committee Posted about this back in March on Cheer Parents Online:
http://cheerparentsonline.com/threads/cheerleading-and-online-privacy.84/
and in a thread here on Fierceboard:
http://fierceboard.com/threads/cheerleading-and-online-privacy.13450/
We should not only stop fake profiles, but watch out for creeps and let our friends know of people we should report and block.