IP banning hurts others on router. Entire family affected

Everyone these days uses WiFi routers provided by their ISP.  If a family is using discord and just one of them or an outsider uses that same wifi Router to log into discord and misbehaves and gets banned, then everyone in the household can no longer use that discord channel. 
 

another example.. If i'm using a school wifi or public wifi and there are 1000 people all connecting to the internet and talking on a Discord for our school and JUST ONE person acts up and gets banned from it, now all of a sudden all 1000 people won't be able to connect to that channel. 

I've tested this out. It shuts out everyone, because the router's IP is banned now. 

This is why IP banning is the dumbest way to handle it. It hurts too many people over a few bad apples. 
That feature shouldn't exist. Taking the shotgun approach just doesn't work. Plus the bad apple can find other ways of getting in if they really wanted to bad enough so it doesn't solve anything but it does cause pain for too many innocent bystanders. And maybe that is the goal of the bully.. to take down everyone with them.