So, on my way to and from work every day, I see a Trek 4300 chained up to a post, but I noticed one day that his quick release mechanism is being used like a wing-nut. That was about 2 months ago.

Would you just mind your own business and let him/her be?

I've been thinking of printing out instructions from park tool's website on how to install a wheel properly, and attach them to his handlebar so he'll read them.

I would hate to see what would happen if his front wheel came off as he was going 20mph...