[romaniitedomum]

America has been doing this for years. I recall a story from a few years ago about an Irishman refused entry because he'd posted something on social media about how he was going to "destroy LA".

Ah, here it is:

https://www.joe.ie/uncategorized/irish-tourist-banned-from-u... https://www.stuff.co.nz/travel/6342775/US-ejects-tourists-ov...

This was back in 2012.