My guess is that this was a poorly thought and prioritized issue. Probably they asked some junior engineer to write a database query looking for a list of acco

My guess is that this was a poorly thought and prioritized issue. Probably they asked some junior engineer to write a database query looking for a list of accounts with IP logs that matched a range of IPs coming from the banned countries, and then they passed that list to another junior employee who deactivated the accounts. Of course, there are many reasons for those IPs that are not your default/work/home, to be logged against your Slack account. They probably didn't think this throughly.