Some people do a pisspoor job at "defending" their spot though. Swerving left and right down the straight, just to be in the way. I'd gladly see to it that those people spin out, but seeing as I'm superslow, I've not yet had the opportunity.
You seem to have misunderstood the concept of racing and apparently LFS. You can race any type of vehicle, including wheelchairs, lawnmowers and a trailer full of angry Scottish sailors, to name but a few. Hell, it's not even limited to vehicles.
72 is quite high yes, at least if you compare it to my 8800GT. I bought a new cooler for it, because it was at around 55 under load. You could do that, or fiddle with stuff inside your case, to make sure the airflow is good.