This would be perfect opportunity for some enterprising gray or blackhats to wreak havoc. We know people reuse passwords. I'm sure there are a lot of weak acco

This would be perfect opportunity for some enterprising gray or blackhats to wreak havoc. We know people reuse passwords. I'm sure there are a lot of weak accounts known, or at least suspected. So... if you had a large number of compromised slack accounts, and a complete lack of morals, you could log in with each of them to Slack through Iranian/Syrian proxies. If Slack are indeed shutting down all accounts that have ever logged in from Iran or Syria, the above could be a brutal denial of service. Followed by a massive PR s##tstorm. Disclaimer: I don't advocate doing anything like that. I just point out that there might be a way to weaponise the backfire...