Facebook users who are separated or going through a divorce might want to think twice about having a Facebook account at all, since things they post online can end up in court.
The American Academy of Matrimonial Lawyers said two out of three lawyers are now using Facebook as a primary source of evidence.
Divorce attorney Norman Levin said he uses evidence from Facebook in custody disputes, looking for parents who are claiming that they're "better," but who appear in photos from parties -- or even in photos naked.
Levin said he doesn't even have to friend the target of the investigation; he just becomes friends with their friends.
"A lot of times we check into other friends' Facebook accounts," he said. "Because if they don't secure their accounts, and anybody can get into them you can go out there over and over and over again. There's no restrictions on that."
Levin his line of work means he's got a lot of "friends" on Facebook.
"I want to be everybody's friend," he said. "The more friends I have, the more of these websites that I or my staff can get into."
Investigators who can't get access to Facebook information through "friends" can hire computer forensics experts. There's usually a local profile that's cached on a person's computer which can help rebuild pages.
"It can often take one piece of evidence to convince a judge that what they're hearing from the other party is not the truth," said Andrew Mapp of Datanalyzers.com.