I race 1/10th buggys indoors on a very tight track and it seems when ur trying to pass or lap anyone ur cars become a magnet to each other. This u can put down to racing incident. If it's deliberately boosting into the back of someone it's not good but that sort of driver wouldn't wait.
I actually hit the back of someone last week, racing incident causing him to go off the track, into a crash mat and then the crash mat falling on top of the car, I waited until he was back on the track.
There will always be people who dont and people who will.
Got to be honest my bigger frustration is marshalling! Especially the top experienced drivers who stand chatting with there hands on their pockets or looking else where! I have always put as much effort into that as my racing but there are so many people who dont and that can really ruin someone's race. Ok u shouldn't crash but if u do I expect to be marshalled promptly but it never happens. Dont get me started on people sitting down when they are marshalling!
My personal opinion.