[DarkAlex]

Personally I don't have any trouble with the noise level at all. Though my experience is limited, having only been to Ramp Riot and one other competition whose name I forget, I find that the DJs at these events tend to go out of their way to dig up one hit wonders from the 90s, so anything that will make those songs inaudible is welcome. (I'm just commenting on stick and other manual noisemakers)
Obviously the announcers should be respected and whenever they are heard the clapping of sticks, etc. should cease, which it pretty much does anyway.
I am not commenting on the sound carts because I have no experience with them, though they seem to me to be an insult to the DJs almost equal to the one that I have already used in this post if used unnecessarily during competitions.