Currently in order to signal support for changes to Bitcoin, only miners are able to do so on the blockchain through BIP9.

One criticism is that the rest of the community is not able to participate in consensus, and other methods of assessing community support are fuzzy and easily manipulated through Sybil.

I was trying to think if there was a way community support could be signaled through transactions without requiring a hard fork, and without increasing the size of transactions at all.

My solution is basically inspired by hashcash and vanity addresses