I agree, the defaults in Slack are too chatty. I think the web interface also does not differentiate as well between messages directed at you and message in a channel you're a part of.
My public communications preference I have based on Buffer and Stripe. It's not that everyone has to respond, but that I think that the more information everyone has the quicker they can respond to problems in the right manner.
My public communications preference I have based on Buffer and Stripe. It's not that everyone has to respond, but that I think that the more information everyone has the quicker they can respond to problems in the right manner.