For the MOCists that don't have facebook, here are the rules (copied from the fb page):
Welcome, MOCists, to Piece Out! This group was created to help us MOCists share MOCs, ideas and generally to make the Facebook MOCing community more tightly knit. There will be contests held regularly, with different themes for each. This is not a totally serious group, however there are some rules and guidelines that should be mentioned:
1. Speak English at all times. We respect that English may not be your first language, but it's the most common language here, so please try.
2. Flaming, spam, and violent comments are not acceptable. Please be considerate when offering advice or criticising someone's MOC. Bear in mind the vocabulary you're using, and if you wouldn't say it to your grandma, then don't say it to us.
3. No unrelated material please. Keep it rated PG and relevant to MOCing (LEGO is completely fine).
So yeah, have fun, mingle and be joyous. Piece Out, bros.