Yes, I can imagine it's hard for Slack to ignore those sanctions, but it does appear overzealous to ban individual accounts after having logged-in from Syria/Ir

Yes, I can imagine it's hard for Slack to ignore those sanctions, but it does appear overzealous to ban individual accounts after having logged-in from Syria/Iran, instead of implementing a country ban from accessing slack. The latter would be far simpler from a technical standpoint, and I would imagine just as compliant with the sanctions.