Having spent some time among the socially alternative American V-Twin enthusiasts I can say they mostly don't regard non-bikers as even being part of their world. Citizens are peripheral aquaintances at most. The ones I knew didn't mess with their neighbors as a matter of practicality. Yeah, they usually like giggle bush.
Yeah, they were never aggressive. They were never particularly neighborly either. I shared some wacky tobacky and gave them a 1 gal jug of cheap red wine, but we were never going to be drinking buddies. I hated all the noise and disturbance that their lifestyle involved, since I needed to get some sleep and get up and go to work. And their parking in front of the gate to my back driveway blocked me from getting cars into, or out of, my property... I just thought it would be risky to complain. Scary dudes...