I'm with Gloom

But I'll add this: A couple of weeks back I took my kids to Matlock and my 2 year old son was on my shoulders waving at the passing bikes (whenever he's out or sitting in the van he constantly waves at bikes!), we stood near a crossing so there was plenty of time for riders to see him and it was a "safe" piece of road to wave back - especially if stationary at the crossing.
Obviously not everyone noticed the cheery 2 year old but many did.
The ones who waved back, nodded, said "Hello!" or revved their engines to acknowledge their little admirer in my opinion were bikers (if you were one of those folk, thank you - you made his day!).
The ones who looked but did nothing or sat at the crossing blatantly ignoring their little fan in my opinion are not "bikers". If you think you're too cool to acknowledge a cheery 2 year old, then maybe you're not quite as cool as you think (If you were one of these folk; have a word with yourself).
Incidentally types of bike/clobber worn didn't factor into it.
That'll be my two pennyworth then!