[yamazaki]

Slack doesn't even know someone's race or ethnicity, thus can't discriminate against that. They are just disabling accounts based on the IP they were created from, which was the best they had to go by to abide the sanctions. This is for sure inexact and bound to have false positives though.

[CPLX]

It’s not quite that simple. A case could be made that other variables are a proxy for race or national origin, and travel to specific countries is one of them.

Of course that argument has an opposing side as well, but it seems prima facie plausible as a cause of action.

[dahart]

Exactly. Assuming ethnic discrimination seems pretty unwarranted.