I don't think it's that bad but burning and shifting away from one payout are two different things and voters ought to be able to do both. If voters think more should be burned overall (that is, that the overall collection of posts is not deserving of payouts, as opposed to particular ones), they can vote for burn.funder posts the way we can vote for hbd.funder (burnpost used to do this). In your example, if you think the 100 is getting too much, either before or after the 1000 is downvoted, then go ahead and downvote that one too!

That said, I don't think burning is terrible.