Can't blame you - it was a bonehead move for sure. I know the guy who did it and will be riding with him tomorrow. Resorting to Masters races only won't make the bonehead moves go away. They still exist in the 4's and 3's. Personally I thin they are worse in the 3's - or at least more damaging when they do come along.
In general I think that has more to do with age than anything else. Then again the rider who did that to you is in his mid 40's.....
I think he did it because he was wearing a sort of unbalanced black and white kit.....