Make custom roles be pingable in specific channels!

I'm a moderator at a 4000+ community discord server with lfg channels (lfg = looking for group) and quite a few active members.

Most of the time when a new member enters the server, they ping roles outside of those lfg channels. After an explanation from the mods or from other members, they just go back in 5-10 mins to do it again, or another new member does it. 

It's highly frustrating for new members to be messaged about his and for moderators to go and mention it again and again to every new member, not to mention flooding the channels with the same message, which none reads even if it's right above their own message.  

To prevent that there could be an option in the role settings tab, where moderators/admins can set in which channels each custom role can be pinged (example below). And when new members try to use those specific roles outside of the selected channels the ping just won't work.