Well I don't know about the US, but the UK enacted new legislation to stop a citizen doing certain (abhorrent) things in countries where it was quite legal to d

Well I don't know about the US, but the UK enacted new legislation to stop a citizen doing certain (abhorrent) things in countries where it was quite legal to do so. This was after a huge media outrage about a certain pop star allegedly being a sexual predator in countries where it was legal. The EU also forced those cookie notices on pages and GPDR about movement of data globally. Being a holocaust denier will get you arrested in Germany, even if you broke that law in another country. That's just three examples off the top of my head.