Sure you can but there's less immediate pressure from management and peers to do stupid and or criminal things. You can't just leave a meeting room without getting fired. You can totally take ten minutes to think of a response and an excuse for the delay on slack. Also... People are less inclined to ask people to commit crimes via text then they are via voice in their place of business. You can imagine why.

The magnitude of intensity you get on Slack is 100x less that what you'd experience face to face.

You can, but that's a paper trail. It's harder to push people into doing something criminal over email and slack without being self incriminating