"I think in cases where I want to stomp on a BIN early on, I would use a second eBay account to do it." I agree. Use another identity. Snipers should avoid being "stompers". Stompers should be proxy bidders. If a sniper wants to stomp, they should have another ID (imho).
Most of the time, BIN stompers do me a favor. Like Steve, I won't come out in the open and stomp on a BIN. Usually someone else will do that for me. Once stomped, my sniped closing price tends to be lower than the BIN. I figure this is the seller's problem because they should have put a higher start bid or a reserve.
Sometimes a curious phenomena will happen. For 2 or 3 days the reserve will block the removal of the BIN. The auction has been visible for enough time for everyone to have seen it. Someone then reaches the reserve. 4 or 5 days later, the auction closes for more than the BIN, and usually the high bid is from a proxy bidder. The winning proxy bidder must have seen the BIN, but decided they could get it cheaper. So they let the BIN expires. Then, having a proxy bidder's mentality, they placed a bid higher than the original BIN.