There is already a way to do multiple votes on a single node.

Since it was not intended, I won't detail the method here, and have only done it myself once to prove the point.

Update: I have just checked and the "hole" has been plugged so that particular method doesn't work any more.

Meanwhile, I am in 2 minds - one says "/msg or email the owner, that is better than XP", the other that it is nice to pick out occasional nodes that are very good.

I suspect in practice that the usual suspects will generate the good nodes. In practice I check their home nodes occasionally and browse their postings as a way of finding the perls (sic) of wisdom.
--
Brovnik