No one is imagining turning into Rambo and overthrowing their local sheriff.I think people certainly do imagine that, although few of them put it into practice. What about those guys who occupied the wildlife refuge? Like a lonelier, more heavily armed Occupy?
Brits gave up their weapons without a fight .. German invasion
Funny thing this. The war looms large in UK national identity; our finest hour, Dunkirk, the Blitz, the Few, etc. However there's no English(+) tradition of anti-government armed struggle, and obviously WW2 we were fighting for the government. There is very little gun culture either. It's just not an important factor in politics. The idea of the government going rogue is just not something people think about - unless you're on the left, which has perhaps a few more wounds. Whereas in the US this particular kind of armed antigovernmentalism seems to be a right-wing thing.
(+) does not apply in Scotland and NI!
The UK history of violent confrontation with the state is mostly "left". Bloody Sunday. Orgreave. Hillsborough(++). Peterloo. Red Clydeside. Brixton.
(++) an accident made far worse by aggressive victim-blaming and systematic evidence forging by police and press.
The ways in which violence, crime, race, poverty, policing, politics, political violence and dissent are conceptualised are mostly entirely different. Ideas do constantly leak through from the US film industry though.