There are definitely a few drivers who have earned the entire class this reputation. Also, with 70 cars taking a green flag with a WIDE range of driver ability, accidents are going to happen. I've seen very unfortunate incidents and I've seen very avoidable incidents.
In NorCal, at least in the SCCA, we've got the attention of the race officials, and we're trying to crack down on the folks who do treat this class like bumper-cars. If you're interested, check out the discussion forums in specmiata.com under the San Francisco SCCA section and look at a couple of the recent threads. You'll see a lot of drivers who are now applying a lot of peer pressure on those folks who aren't so much racing as just driving as fast as they freakin' can while on the track with others...
I've done an entire season now with absolutely, positively no body damage - knock on wood.
Dean