It happens here too, if you ride a lot you are always going to meet ar** holes. Mostly the people I've met have been very polite and usually quite enthusiastic, I often get "ohh I wish I was that fit/brave/having that much fun". Only blow ups I've had weren't even mine really and they have been related to dogs not being on leads and heading for bike wheels. My other half nearly had a full on punch up with some T88t on top of a hill because his dogs were not on leads and ran at the bike nearly causing a collision. I give way to people on horses/in cars/walking. Actually, I always give way to everyone, I'm a very considerate rider but as with anything, you get bikers who can be complete ar** holes too. That's life I'm afraid.