At least where I live I think Roadies are probably a bit better than society in general when it comes to common courtesy. That being said there are plenty of problematic riders that seem too self absorbed to care about others. It's reflected by their lack of friendliness and lack of respect for the rules of the road. Maybe one in ten falls into that category where I live, but they are the ones we remember. I'll bet if I were walking in a public area, maybe only six in ten of the general public would return a hello or a nod.