I think Anonymous Monk votes should be votable on like any other. There are some quite good things posted occasionally (as well as a lot of complete crap!).
The less anonymous among us should be able to have some influence on whether an AM post is considered informative or actually is complete rubbish. Just as we can for the logged in users.
Unless the voting system is merely for 'give user xp' which seems a little trivial.
It should be possible to only view nodes with a reputation > 2, for example, to only get the better (or more popular at any rate) nodes.