The time and attention of YAM holders is valuable. Something should be given up to submit a proposal in order to reduce the waste of time of YAM holders.
YAM holders do not have the option of ignoring proposals as any proposal could be negative for the future of YAM and need to be voted down.
Therefore, making submitting a proposal incur a cost is needed to prevent too many proposals from being submitted.
A fresh proof-of-burn of 1 YAM should be required with each proposal submission to make it a valid submission. The Ethereum transaction ID of this burn should be attached to the proposal text. Burning involves transfer of 1 YAM or more to this Ethereum address:
0x000000000000000000000000000000000000AAAA
viewable at:
https://etherscan.io/address/0x000000000000000000000000000000000000AAAA
Note that the traditional burn address:
0x0000000000000000000000000000000000000000
is not being used, as many Ethereum wallets will not allow a transfer to it.
In flight proposals which are submitted before YIP-100 but approved after this YIP is approved can alternatively post proof-of-burn in well-known alternative locations such as the YAM discord.