I play both multiday and realtime, and I think the only times I've been booted was in my early days with friends when we didn't entirely know how everything worked. I do remember being booted from a game in which I surrendered due to having to go away for a few minutes (and of course not everyone accepted the surrender). Nothing serious.
Kind of off-topic, but I saw the topic going in that direction.
I'm at zero percent. I got booted once when I had to call the paramedics for my neighbor and the other time was when I tried to play after coming home from the bar late at night.(it went about as well as you would expect)
I'm at 19 boots out of 2300 games, almost all of the because of internet or warlight server probs. Only ever forgotten about 2 games! if i dont get booted for the next 1500 games i can join zapper on 0%!