Assuming that you meant your mentor postyour mentor post, I think the problems was that you gave us a partial solution. You essentially said "Let's implement this feature!" but you couldn't really give us any details about what this feature was about. You never explained what the purpose of mentors would be, except in a very general and abstract sense. This is, effectively, a pointless solution because it wasn't really one.
If you want to get a discussion going about a change to the system, you need to at least be a little more specific. If you said, for example, "mentors should be able to privately contact users so that they can provide guidance", then we have somewhere to get started discussing. That might be a good or a bad idea, but it's a starting point. Your post, on the other hand, felt like an empty feature request.
As for Meta voting in general, it's not a good/bad paradigm like full SE sites. Don't take it too harshly—for example, I noticed you posted a (now deleted) post about SO downvotes, and got downvotes for that. As you were wondering, that was irony on the part of the MSO community—we do like downvoting anyone who mentions downvotes, because we're a much more lax community that other SE sites.
