You will find the best and worst of human beings in that game world. You can commit any crime imaginable there (except of course, sex crimes) and it is all perfectly legal in the game framework. Only thing that's truly illegal is real-money transactions for in-game items. There are a few other things like abusive language or threats, but like anywhere else, the powers-that-be are pretty selective of what they'll enforce. Particularly if it involves a cash-paying player with multiple accounts.
I joined in May 2013. Absolutely fascinating and mind-boggling complex. Some really great people and some real bastards, too. Lot of ex-mil in leadership roles. Most notable was player Vile Rat who turned out to be one of the ones lost in the 13 hour rooftop battle in the Middle East. He is permanently memorialized in the game.