On one hand, yes, but it's fair because it's an embargoed country. I mean, it's not fair in my opinion, but Slack is forced to abide by the laws of the United States. This approach they've chosen of banning everybody who's ever connected from Iran is stupid and ham-fisted and they are being rightly ridiculed for it.

On the other, the author of the thread is accusing Slack of profiling him racially. What he's implying is that a human proceeded to stalk him around the Internet, on social networks, etc to check if he is an actual Iranian and ban him based on that. And that is a very, very grave accusation.

No it’s not. There are millions of Persians in the US that haven’t been to since the 1970s. Those are of the same ethnicity as someone living in Tehran. There are millions of Persians living in Europe as well — also ethnic “Iranian” who would be unaffected by a geo-ban.

So no, a ban based on signing in from a specific locale has zero to do with ethnicity or race.