LINE,telegram,threema and WeChat are not even american companies. Can't they just tell the FBI to suck a fat one when they ask for user data?
You don’t get to pick your jurisdiction and then operate globally. You’re obligated to follow the laws where you want to operate.
- block the company nationwide, see Huawei (also includes ceasing contracts with app stores, both of which are American)
- block access to your website, see TPB
- harass you when you travel, either to the US or fellow countries.