If so, when all votes are down we can know what they are against
On feature-request answers, yes
Quoting the Help Center:
Voting is different on meta. Like normal Stack Exchange sites, Meta allows members to vote on questions and answers. For most posts, votes reflect the perceived usefulness: well-written, well-reasoned, well-researched posts tend to get more attention and more upvotes. Highly-voted and frequently-linked posts may become part of the community-curated FAQ or codified as part of the site’s Help pages.
Unlike normal Stack Exchange sites, Meta invites the community to discuss, debate and propose changes to the way the community itself behaves, as well as how the software itself works. On posts tagged feature-request, voting indicates agreement or disagreement with the proposed change rather than just the quality or usefulness of the post itself.
Also, this type of disagreement-downvoting leaks out to the rest of meta as well. Questions or non-feature-request commonly gets voted down due to disagreement, though these votes aren't binding.