I'll be the bad guy here. I think you have to be careful regarding "pushback". In the OP, at least from the clip, the ranger, while maybe being a nanny, looked to be politely explaining things. Whether you agree with the lockdown to it's current degree or not (I'm in the "not" crowd), the unarmed ranger was doing passive/educational enforcement in, again, what appeared to be a polite manner. Disagreeing and debating with him would have been acceptable. Ignoring him would have been acceptable. This was not. This was a drunken punk that we would otherwise be chastising about getting a haircut and a job. I kinda hope he gets community service picking up roadside garbage.
The place for pushback is with examples like those Wisconsin cops. They were basically armed thugs, but that woman stood up to them admirably. She was a good example of pushback.