I'd have to agree that it would get to me to wave to a guy repeatedly and him not wave back, no matter how he looked. I'm personally not into the full kit look(only one reason is that I would look like a billboard with all the ads stretched across my girth), but I have no problem with those that choose to dress that way. I'm sure there are those that are in full kit that look down their noses at me. Oh well.
No matter what, common courtesy is being lost and neglected through less and less personal interaction, and there is nothing funny about that. I try to wave or return a smile to every single person that I meet, no matter the emotional weight I may (or may not)be carrying at the time, and it is amazing how many do not reciprocate, or are blatantly rude in return. Just my opinion. Until he proves otherwise, he's a d1ck.