Good, on the right map with the right people.
This is very educational, first off, it uses a completely correct Army ranking system, with real Army rank insignia, and a good ranking. It also uses real weapons. It has helped a friend of mine in JROTC.
About the right map...Wake Island 2007 is a very, very good map. Download it. The problem is, lots of n00bs get on there, that may be Seargents, but have the maturity of a third grader (no offense to any of the mature third graders out there.)
People do teamkill for planes, and do lots of things for things, that would normally get them kicked. But, when this happens, people get emotional and swear. So, be careful.