It didn't seem to be an issue at Palmetto or Detroit, but my memory is shot and I'm not out on the field very often, if at all. It didn't bother us programmers, though.
It depends on the venue, I guess. There's not much we can do about it beyond getting a small mob to go and politely ask the DJ to tone it down a bit, but there's always the option of escaping. When the competition starts to become too much for me, I just leave the building or find another area of it that's quieter and less crowded. That can be enough sometimes, especially when you need to return soon.