BBC: Slack 'bans users' who have visited US sanctioned countries

This is a dupe of https://news.ycombinator.com/item?id=18730314

Original discussion: https://news.ycombinator.com/item?id=18724107

The bans seem a little over the top compared with what is legally required. I went to Iran in 1993 - I wonder if I'm on the list!