An issue with the android client showed up at a big tech conference last week that had a slack for attendees. With scores of people joining the main channel pe

An issue with the android client showed up at a big tech conference last week that had a slack for attendees. With scores of people joining the main channel per minute, the "XX has joined" messages scrolling past dominated the discussion and made it useless. There's no option to disable joins. To their credit, I filed a feedback and they acknowledged the issue.