I recently used the saying "didn't your mother ever tell you not to air your dirty laundry in public" twice one day. I know sometimes if feels good when we're full of our self-righteous selves to let off a bit of steam in public, but it really can come back to bit you on the bum.
Internet etiquette has a purpose. Protecting our sore bits. Your ex might be a cow who's trying to kick you out of your jointly bought house, but can you honestly say that you could trust every single person you're friends with on Facebook with your intimate secrets? I certainly couldn't.
Lively topical debate is one thing. Mud slinging and insulting is NOT the way forward. I've today been seriously called a "terrorist" for my disagreeing with the opinion of someone who's sense of self importance has got a little out of hand. That's just not cricket.
It really doesn't pay to get too far up your own (or anyone else's) bum. Being not nice about someone in public can only ever be a bad thing. The old adage "if you don't have anything nice to say ..." might be a cliche and old fashioned, but it goes a long way to protecting you. Can you be sure your next boss/partner/squeeze/best friend isn't reading what you've written?
Rule 1- Don't write anything that could be used against you. It probably will be.
Rule 2- Don't tell the world what you would only tell your best friends in person.
Rule 3- Don't get all above yourself and above your station. It's all a bit of fun. Don't take things too seriously, it REALLY makes you look like a bit of a ...