I have just done a blog post elsewhere which amongst other things highlights the perils of modern technology and the unfortunate ways the technology is impacting on family law cases.
Readers of this site might be interested in the story hear about avoiding the bitter twitter - the same applies to facebook - either make sure your ex or his friends are not able to see your posts or don't post it - the number of times the indiscreet status updates about the new boyfriend or the heavy night partying come up in cases is becoming boring.
It's the modern equivalent of advising you not to drink and dial.
Naturally some clever cove has come up with a technological solution: a new Firefox plug in called the Social Media Sobriety Test which you can set up to stop you from using certain sites at particular times which you set unless you can pass a sobriety test (typing the alphabet backwards).
If you want to see some good examples of why this might be very necessary take a look at Texts From Last Night!