yes? I mean the next step is to have an automated phone call go out to people (which is what we do for critical alerts). Short of that, slack is on my desktop

yes? I mean the next step is to have an automated phone call go out to people (which is what we do for critical alerts). Short of that, slack is on my desktop, laptop, and phone. If i don't have one of those around me at the time, you aren't getting ahold of me for any reason. So yeah i think it's perfectly valid for security-critical notifications. Plus this isn't as security critical as you'd think. I don't want klaxons going off every time someone sshs into a server... This can just be an additional layer of security.