Thanks Peregrine. I may not agree with all your posts but sometimes you surprise me. This is a workable solution that I don't see hurting legitimate players overall. It would stop people from AFK leeching in random parties and RMT(or whoever) with those massive parties will need to bot more. Doing that they will be violating ToS and can be banned.
If I do see a problem I will address it. As of now it is the best proposed solution.