pics

(Super Mario Brothers music from stage 1-1 starts playing)

1. I see little reason to doubt it
2. It means whoever hoisted it considers there to be a crisis, which is consistent with accounts of public offices being overtaken by random young white men who are rapidly taking control.
3. Speaking as a non-American political scientist having worked a little with rule of law and fascism, it seems a bit late to start worrying. Think about what you can do for yourself, your neighbours, and your country, urgently or in the longer term. It's going to be ugly for a while.

#3 depends where you are on the hit list I suppose. I'm trans, so I'm well past worry-o-clock and am actively making arrangements to leave the country. Someone like a cishet white male tech worker has a lot less to worry about though

You should have been worrying for years now.