Yes, always snipe - no guilt at all. When I have more time later I'll post my "amusing German sniping story".
edit: apparently I've been allowed to post it now....
About 5-6 years ago I was after an extra battery for the DSLR camera - looked all over and found a German seller selling them starting his auctions at €0.99 - so I watched one and there were 5 or 6 bidders chipping away at €0.20 increments and by the time it was due to end, it was at €3.85 inc post... so I thought, worth a fiver to me - so put in a snipe of €5.34 and won.
Back then eBay let everyone see who was bidding and who won and I got a shitstorm of messages from all the other bidders, complaining that I'd somehow jumped the queue and that it really wasn't on. I mean anyone that's ever been to Germany will know how the queuing works over there. I just ignored it all and moved on. Later that day, I spotted that another battery had been listed by the same seller at the same starting price... so I watched it and these same 5-6 bidders were chipping away at it all week, so I buzzed in again with seconds to go same top bid and won again.... The seller listed another one later that day so I watched it for a couple of days and then put in my €5.34 bid with 5 days to go...
The chippers went into overdrive - chipping away at this "massive bid" - until one of them finally managed to get past it with about 12 hours to go. So I put in another slightly higher bid and left it at that, went out for the day wondering if I'd been lucky again...
Sadly I wasn't - well actually I was but in a different way - the chippers went into auction frenzy and bid it up to about €15, I had a mountain of messages "ha ha we won" kind of style. Thought nothing more of it, until I went into my paypal account and found a €3 tip from the seller - it was the most he'd ever sold one for and was pissed off with the chippers. Thanked me for my help in making them pay