Well said @jsull9, a Community Nervous System (an asynchronous video forum where issues are discoursed and debated with the Community voting its level of resonance or agreement with everything said) would appear to prevent spam proposals entirely.
The first level of deterrence would be the necessity of putting your face on your spammy message, but if that is overcome the Community will immediately vote you down and possibly out. We are right now developing what we call an ambient moderation system, completely decentralized.
A third strong deterrent is the fact that the Civol panelists engaged in discourse before the Community will typically be experts with skin in the game and a reputation at stake. And fourth, it is extremely unlikely that a spammer could even become a panelist as there is an auditioning process and you have to be voted to the top.
So once the Civol CNS is in place, in order to make it to the NNS a spammer would have be willing to publish a video delivering the spam payload, it would have to then not only avoid detection as spam, but actually be deliberated and voted to consensus by the Community. Only then would it be sent to NNS for ratification.
In sum, it does look like the Civol CNS will be the end of spam proposals.