Earlier quoted context omitted.
Despise/tolerate/mess? The basic offering is a simple chat client with 'channels' and an easy signup/invite flow afaict.
Slack is the poor mans IRC. The Dropbox of messaging apps. It's easy but if you want to hide your email from public view or customize anything good luck. Slack is notoriously ignorant to customer requests.
Slack was never meant to replace IRC, it was meant to be used at work. Why would you hide your email from your colleagues?