No, you're not the only NASCAR person here. It happens to be my original passion. So, I can-and do- see what you're saying.
However, you're talking about the last turn on the last lap at a track with restrictor plates, not lap 3 of 400 at Dover(just to pick a track). I don't think someone wedging their way on the inside in turn one on lap three is acceptable. Wouldn't you agree? If you did that often, you'd eventually find your way into the garage because you met the SAFR barrier. It isn't very often that we find ourselves in a door-to-door situation within a half-mile of the completion of the race fighting for a win. We also don't have to deal with the twitchy-loose nature of the NASCAR cars as the real drivers do, so we have more room for error. In real life, you get aero loose, but in our game, you don't. (See Jimmy's crash late in the Charlotte race)
Online racing is unfortunately glitchy, so it's better to avoid contact, I believe that is the point. Now I think you've missed the original post. He wasn't asking if it was dirty, he was asking where to draw the line. If you're going to draw a line, its easier to have the ideal that there is no contact. Yes, it happens. It usually isn't dirty. It isn't always on purpose. I completely see your point KB. When it happens it isn't necessarily dirty, and it usually happens more with NASCAR because of the track-car-field size combination. Hopefully you can see the other side that I'm describing.