Yes I have. 16th MP bge 42nd MP det (Airborne), Fort Bragg NC. I am currently a reservist with the 3d Military Police group at Fort McPherson, GA. I served in Kosovo in 1999 as part of Task Force Falcon. In mid 2002 I went to Afghanistan as part of Task Force Devil. I went attached to the 1st Brigade 82nd Airborne Division 504th Parachute Infantry Regiment Devil Brigade.
Americas Army was made by the Army for the Army. It has done such a great job teaching civis about combat, the Army has started using it as a training tool. The clan I play with is full of current Army and Marines, so we apply the same tactics we would in real life. If we didnt have the little icons next to our names showing we were real soldiers we would be called cheaters more often. It still happens. Most of what we do is use a program like teamspeak so we have voice commo. Then we just move and communicate like we would in real life.
I can see why the Army is so damn intrested in it now, more so than just some recruiting tool. Fighting is AA is much harder due to a few factors, first is the lack of SA. Second is the boldness in which emy troops fight with. And third, is the simple fact you have no idea what the bad guy is going to do next. In real life we have some idea what the emy is going to do. If you see a sudden surge is frontal fire then you better start watching your flanks. That is a key indcator someone is about to flank you. However in AA if someone starts pouring on the fire at your fighting position, they most likely caught a glimps of you and are spamming your area with all the fire they have. And why not? Bullets are free and lives come and go quickly. This factor keeps you on your toes. Back when I was with the 42nd MP detachments SRT unit, we had a saying. It is not the professionals you have to worry about. It is the amateurs, you never know what they are going to do next.