[paxys]

All of this is possible to do via custom bots. Ultimately there's no single standard Slack can enforce that will work for all of their users, so it's best to stay as lightweight as possible when it comes to stuff like etiquette.

[npunt]

Alternately, defaults really really matter. Of 100 teams that adopt Slack, only a fraction will know about, let alone enable, let alone write custom bots.

If you're in a position like Slack where you have control over defaults, small changes like the introduction of some default etiquette options that orgs can adopt can have massive leverage in improving comms, which ultimately would benefit the product and users.