This site has one real big rule: behave maturely.
Put another way, don't be a jerk. You can be cranky. You can disagree. (Heck, we encourage disagreement, so long as you don't take it personally.) You can knock, attack, agree with, like, argue with, etc. the posts or ideas or statements other people have made, but the line is drawn at disrespecting the actual people. Call a post stupid; don't call a member stupid. Respect others. Give them the benefit of the doubt - text is a difficult medium to use as it conveys no tone of voice. Sarcasm in particular, often used among friends, doesn't often come across online as it does in person.
Please remember that at the end of the day, we are all golfers. Golf is a game of honesty, integrity, and so on. But at the end of the day, it's just a game. Let's not take ourselves too seriously, please.
Enjoy The Sand Trap (TST). Welcome aboard.
P.S. For all other rules, see your welcome PM, or the FAQ.
P.P.S. Keep this in mind, too, please: https://xkcd.com/1357/