They were young and I suspect after seeing how well your wife could handle herself they learnt a little something on making judgements. Younger people often are more likely to slip up like that, because they have less experience in life. Although, admittedly, some people never learn. I do hope someone else had words with them though. Perhaps one of your mates let them know how close they came to being knocked flat!

You are right, we all make judgements. We just learn to look past them before drawing final conclusions so as not to embarrass ourselves. ;)