Sometimes when you exile a survivor they say really mean stuff.
I mean... it makes sense, but it would make even more sense to have them turn hostile sometimes, maybe they grab a pistol from the locker by themselves and try to kill you in revenge.
Maybe they start a hostile enclave somewhere close to your base and attack it after a little bit.
Maybe they would even steal some resources and run away with them, leaving the map if you dont stop them.
If theyre a loved one of another survivor in your community it could have an effect on morale or cause someone to become frustrated, ...
There is so much exiled survivors could do other than just running away and I would love to see it!