you definitely dont want to be shusshing people, unless they need to be shusshed ... not for the recording purposes but for sheer annoyance.
standing still is good, but not "statuesque"
wear the mics at your temples on some glasses and position yourself dead center. if your old and tired like me, then center mezz is great. nice seat. good acoustics. great view.
pull the heat!
but dont forget to enjoy the concert too.
I agree with everything that Nick said. Shusshing is just obnoxious...they paid their money too...and it's not going to keep people quiet anyway. Besides, the more you shuush, the more you cause others to dislike the taping community. This is one reason given for some bands that don't allow taping, because some tapers can be so obnoxious about it. Obviously, I'm a taper and I've been enjoying a show with my friends and have had other tapers come along and try to tell me I had to be quiet...to which my response is that I usually talk louder. I know that they're trying to pull good clean tapes, but that's just plain rude...so I reciprocate.
I'm not a born asshole, but I can be one in the company of others.
Regarding hat mounts, I agree that you don't need to stand statue-esque. In stealth mode, there's simply no way you're going to elminate the background talking from the tape unless like Nick says you're on the balcony or someplace like that. If you're standing in the crowd, inevitably 3 or 4 times during the show, someone will stop DEAD in front of you and start yakking about world peace. I just move a little right or left as needed to try to minimize the yakking. Generally, I find that my AT-853 omni's tend to minimize the talking pretty well everywhere but when the talking is directly between me and the stage, so it's not all that important for me to move away more than say 8 to 10 feet. Course, alot depends on the volume of the stage performance. The louder the music, the less you'll hear any talking regardless of where they are standing.
If you want as perfect as possible, then you probably need to stand generally facing the stage. When you turn your head to stare at the boobs on the girl standing next to you, you'll hear the dynamics change in the recording. Obviously, if you walk around the room or change your position much when you are trying to avoid talkers, you'll hear the dynamics change.
Another pretty obvious tip, but I like to get there early and use the sound of the warm-up band to tell me where would be a good place to stand for the main act. Walk around and listen to the room in various locations. Listen to not only the direct sound but how much reverb you're getting at any specific location. For example, there is a venue that I used to go to in northern Va...the State Theater in Falls Church...which was a great place to watch a show but has absolutely terrible room dynamics. To my ears, standing in front of the PA gave me far better recordings than FOB.