Yeah, all good stuff I agree with. I hate seeing unnecessary abuse/rage - basically anything physical done to a machine that is not doing anything to keep the ball in play. Don't like seeing bang backs either even if they do keep the ball in play, this is something I'll just never even try to learn.
I think there was a point for a couple of weeks in my pinball life where I started pushing my machines out of rage upon draining when they were being repeatedly nasty to me, but I realized it was pointless and stupid. I also saw some other players doing this after every single ball drain and realized what tools they looked like. So instead of getting mad I now redirect my emotion to disappointment on ball end and hang my head in shame to save the machine the abuse.
It's funny to read the wedding ring slap save comment as well, as I pretty much took my wedding band off for good once I brought some machines into my house. Even without the slaps I just worry it will scuff the machine (and the band) up eventually. I always treat other people's machines better than my own as well, and even with my own I am very mindful to do nothing to them that will actually cause cosmetic damage, even a small scratch - I like to keep everything minty.
It's actually taken me the couple of years of playing to work the courage up to regularly slap and nudge and even slide a machine around hard enough to have some success in tournaments. If you are playing opponents in a pub with loose tilt on a tile floor and everyone is slide saving and it seems to be accepted behaviour, it's just something you have to do to keep in the race and there really isn't any harm in it. At these same pub tournaments I've seen operators treat their machines WAY worse than I would ever treat a machine to free a stuck ball, etc. Their machine, so their choice, but in general the on-location pub playing crowd that likely doesn't own a machine of their own that seems to treat the machines worse around where I play.
I was also just watching some expo tournament qualifying coverage and saw some strange behaviour I'd never seen at any other tournament. It seemed many players who were going to have a void result would intentionally tilt the machine before walking away. While I don't think the machine is suffering any damage from this, it sure seemed like an A-hole thing to do to the next player up to leave the tilt bob swinging like that, perhaps to gain a competitive advantage. Just curious why this was rampant at expo, and I didn't see this happen once at two other circuit events I played at? I hope it's not some kind of new trend.