Drafting is perfectly fine, but there should be some courtesy involved. I also doubt it was an issue in this case. Inattention, mechanical problem, who knows what. Several factors came together and you took the brunt of it. That's the part that sucks. Dude should have stuck around, but nobody's ever responsible anymore.

My suspicion with those adamantly opposed to drafting is they don't have a very good handle on it. Fear of the unknown as it were. That's fine, but don't let it screw up your judgment enough to pursue nefarious acts.