1. I'm torn on this. Yes, it's annoying to have people interrupt with basic questions. On the other hand, I've had multiple co-workers spend 2 full days trying to figure something out that I know off the top of my head. I wish they asked sooner so they wouldn't have wasted so much time and ended up so frustrated. Often times it is documented, but they think they're solving something new, so they don't look.

I used to work with another team whose boss would document everything on the corporate wiki, similar to how the article suggests. If someone asked a new question, he'd write something up really quick, and send them the link. After getting a few of these links I always started going to their wiki before reaching out. The key is consistency across the whole team. Once it breaks down because someone thinks they're too busy, the pattern is broken and the interruptions continue.

2. Any chat that abuses notifications gets their notifications shut off, and I stop reading it all together. If they really need me, someone will come find me. This only happens maybe once per quarter, if that.

3. I think there should be a hard limit on how many people can be on in room. I'm in a few with 1800 people. It's mostly random people asking questions to a support team, which should instead be going through the ticketing system. Or they are announcements and reference material, which should probably be going out via email, where we have 10 years of retention instead of 6-12 months for chat. So much information has been lost to time.