I think that the issue often encountered at a site is not necessarily the high rate of fire (yes, you HPA spammer) but the general poor attitude of overshooting. BBs are cheap so why shoot a few aimed shots when you can spam dozens of BBs down range, spray and pray fashion. There are definitely players who can see their BB strike the target but still keep shooting regardless, and they could be on a stag do, a site regular, a multi-glammer, chav, or experienced player who should know better. If you put enough plastic on someone they will eventually call the hit. Mainly playing CQB, high rate of fire is more noticeable due to the close proximity and limited distance between players. I prefer to just use heavy BBs and shoot less of them.