I'm still a newbie to RC racing (6 months with a 2wd buggy) and so haven't done any "big" meets yet. But, I did race karts and small full scale cars for many years.
I take a similar view to RC that I do to full scale motorsport (as really it is based on the same principles) that an element of contact is always going to happen and is part of the course really, especially when handling vehicles (of any size) on the edge.
Therefore a little rub as you slid up the inside or a light nudge, nose to tail, is not a misdemeanor as long as the other driver's race/progress (other than your pass) isn't disrupted because of the contact e.g. he doesn't get put on his roof, left on the wrong side of the edge rope/trunking or slammed into a wall.
A serious error in judgement, which results in the above examples, by you should always be acknowledged by letting the aggrieved driver back past you.
In full scale motorsport a serious error in judgement normally ruins your car too and often you're out of the race, so this isn't necessary/possible, but an apology afterwards is usually given.
Luckily, as I'm new, I'm normally the one trying to get out of quicker guys' way, but most at our local club are very good. There will always be "red mist" moments but they seem to be quickly forgotten and forgiven.
Maybe my opinion will change after my first series of regionals and I'll take an approach similar to Sebastien Vettel!
