I don't vote on Anonymous Monk postings:

• I don't have any filter to show/hide postings which are voted highly or voted down. Without such a mechanism, there's not much value to me personally in voting for/against nodes at all. If I could send all -3 nodes to a virtual oubliette, I'd be quite happy.
• The votes are more of a feedback mechanism to let authors know if the community finds the node as valuable discussion fodder. The anonymous writer can't see the feedback on their own node, so it does not help encourage anonymous writers to ask good questions nor does it discourage them from writing unresearched junk.

(I'm not saying that I vote for things I agree on, and vote down things that I disagree; to me, a ++ is for nodes which aren't a complete waste of everyone's time, even if it's not a perfect answer or a perfect question.)