Here is the most applicable of the "recommended usages for the consideration feature":

Request that a node be deleted. Please only do this for blatant trolls (egregiously offensive) and true duplicates (where a post consisting of "I gave the same answer as some other monk but was slower" is not a duplicate). For useless, stupid, off-topic, and annoying nodes: if it is a root node, then don't approve it for any section; if it is a reply, just ignore it.

I don't want to sound like I think there should be a voting system, but if there must be one, the rule that says "Each time you use all of your votes in a given day you will receive an experience point bonus" should be eliminated. That rule probably explains why I've received ++'s for ordinary questions that I've asked.