Yes, "yahoos from the city" is a bit unfair. :-) I was living in the SF Bay Area at the time and most of the out-of-town traffic through the area of that property was also from the Bay Area. We made a point of getting to know the local ranchers early on and I had lived in the rural West as a kid, so I had a vague idea of the basic rules.

More often than not, it wasn't that people were trying to behave badly, they were just careless and exercised poor judgement. A recurring annoyance was someone in the Bay Area buying an SUV and deciding to take it off-roading deep into the wilderness with no prior experience and being completely unprepared. In addition to frequently damaging their vehicle beyond drivability or getting it hopelessly stuck far out of mobile phone range, they would tear up the roads and land joyriding, leave gates open, run into the cattle that live in the wilderness, etc. I probably personally rescued people a dozen times who had no business being out there in those vehicles (an SUV off the new car lot is not equipped for that environment), with that lack of preparation, with that little experience.

Not malicious most times, just ignorant and engaging in poor behavior without understanding that they shouldn't be doing those things.