Where are the rules?
The post goes to 100% null so that's fine, but we need to know where the comment rewards are going to have confidence this is not a scam. In the case of my @burnpost, the rules state clearly that the rewards will be burned, the comment liquid rewards are burned in real time by a bot, likewise for the ongoing power down.
Alternately you could use one of the alternate interfaces that lets you specify beneficiaries on comments.
RE: Steem experiment: Burn post #1