Overthrowing democratically elected leaders.

ITT: People who don't know what customs are.

Also, I'd go with saying the pledge of allegiance in schools. I feel like a lot of other countries would find doing something like that horrible.

Complaining about poor service at restaurants and asking to call the manager. You guys do it like its nothing. At my place, if you're gonna complain, it better be something big.

TALKING LOUDLY ON PUBLIC TRANSPORT. Sincerely England.

I feel like people just want some kind of conspiracy theory to justify a death lol.

But Alexei navalny definitely fits this.

The Boeing whistleblower - John Barnett

Is there actually anyone who believes that Alexei Navalny died of natural causes in that penal colony cell in Siberia. 🤨.

Netherlands

On new years day we look for a body of water, traditionally the sea, and we take a new years dip. We run into the sea, on januari 1st, even if there is snow and subzero temperatures.

Germany

Where do i start...

Maybe Stocherkahnrennen (Stake boat race)?

The most known one is a competition for Students. It involves heavy drinking, a self built boat and a team of 8. The goal is to be the fastest down a river. One pushes the boat with a stake, while the other seven have to steer and defend against other boats with their bare hands.

An other one would be the labour day traditions:

* local to me, people take "Bollerwagen" (small, hand drawn carts), fill them with crates of beer, put a speaker on top and hike to the top of the next hill with their friends while drinking. As this is open to every age group, fun things happen, like seeing your teachers or someomes grandparents get wasted.
* in big cities people putting expensive looking cars on fire has become a tradition of its own
And dont get me started on alemannic carnival, scared the [hell] out of me as a kid. Getting chased by people in costumes and scary wooden masks, that can grab you and take you with them or even hold you over a fire. Not fun.