Feature request: Disable direct messages for some users

Quite often (especially new) users will inadvertently end up writing a question as a Direct Message or even in a chat.

While I don't want to eliminate direct messages between regular users, it would be great if there was an option for me to set so that my user can only receive new direct messages from certain groups, from specific users or if I initiate myself.

Perhaps this should be a potential limitation enforced through group permissions etc?

The reason is - our community is hastily growing. We're building various automation of the email and support requests we receive, so that we with as little effort as possible can redirect their requests to the proper channels.
For example we'll be receiving emails through Intercom, and I've built an Intercop app (plugin) where I can just click one button, and their email is converted to a forum post (which is made by the user).

Since I can't do that for Direct Messages, and also to just have one less noisy input in my online life - it would be great if I could disable direct messages to my user. BUT - since we'll be building the chat service where users can share stuff directly to each other in private threads - I would love to still be able to grant access to DM'ing me from a few users or groups.

Hope this makes sense. If it's easier to start with, I would love to have the ability to just disable DM's to my user altogether.

Also, it perhaps would be nice if we could turn off chats, since quite a few new users end up asking questions there, and we're not really using chats at the moment.

All in all this would just be to make sure our users focus their attention at the aspects of the forum that we use :)