ok, so in the band that I'm in, occasionally we get some feedback... and they are trying to blame it on me, saying that I'm standing too close to the microphones... but, if my amp is on the other side of the room, would me standing too close to a microphone cause feedback on their p.a. system? I think it is because usually the feedback comes when the mics get too close to each other... but no one else seems to notice that, and they want to try to blame it on me. would having a guitar, even though the amp is far away, near a microphone (2 or 3 feet away) cause feedback on their p.a.?