[llamataboot]

I still hate that anyone can add anyone to a channel - it's not an "invite", it's just global "add to room" privileges.

In general I find Slack not very concerned with your own ability to control your experience (no ignore user feature, can be added to rooms, can be added to rooms that then get pinged with @channel and your notifications start blowing up, etc).

This may be 'expected' in a small company where of course everyone should talk to everyone, but for larger companies and the plethora of various open-source or interest-based communities now using Slack, it's not so good.

[Bahamut]

Even worse than the channel mechanic is the thread mechanic - anyone can turn your comment to a thread, and you cannot mute threads by default. Even worse, updates to threads suppress channel unread notifications, causing you to miss updates.

Manually having to follow threads and unfollow threads is a nightmare compared to the one time configure experience of channels, especially since you cannot just mute all threads, and is easily the worst part of Slack to me.