Group DM Spam

For some reason, my friends decide to not just always be in our private server, and instead create endless amounts of group DMs (JUST to get someones attention). This is ok, because it really happens over time... but every once in a while, one specific friend ALWAYS leaves them 20+ at a time. This literally spams my dms, and since I have a lot of people I talk to, I can usually just leave them alone and the group chats will make their way to the bottom of my dms. The reason I don't leave it is because I sort of find it as selfish, and beyond that, it only further spams my other friends. It would be really really great if there was a way for us to toggle off notifications from someone leaving a group, as it is really annoying.