Help Prevent Teaming in Solos?

Is there a way to not allow people in a party to join solos? I think there would be a lot less teamers that way.

Whoops I searched for similar didn’t show up

Maybe when private games become a thing sure, but then people who want to do 1v1s or servers wanting to do events wouldn’t be able to do them with this. Most teamers disregard the rules entirely, so they’ll just figure out workarounds, best thing to do is just simply report