From my read, this is my take on a plan.
The NNS is not the place to add ad-hoc proposal but a proposal should be judge and agreed to before going onto the NNS.
This forum is where proposals for the NNS should be raise and argue till a consensus is reached and then all will know the purpose and reason to vote, accept and then no need for a cost of a rejected proposal which could be set at a million to deter spammers and no fear of a genuine proposal not being accepted as we have agreed and secure the success as a community.