My husband used to ride and do CC dirt bike racing. I never cared for riding but enjoyed watching , the camping out and peace and quiet with them in the distance but the rebbing, drinking (after riding), and music in the evenings never bothered me either.
Maybe it's just the crowd hanging out where you are. My husbands group would never have even considered riding near horses and non riders would visit our camp as we would theirs. I heard my husband mention many times "If we get too loud or bother yall, let us know". It was kind of fun actually. His only enemies were the rattlers. The good ole days! :')
Maybe it is one generation down from when you were there too. I don't think any part of our society is seeing better manners with each generation. ;~D
There is a balance.... I'd describe it, but I gotta go for the day. More later, if the thread is still interesting tonight!