I think you misunderstood @williambanks's post. I believe he meant he was upvoting my comment for visibility. But I beat him to the punch.

The only reason I upvoted with full weight is to discourage others from downvoting my post to invisibility. If someone does a 'sybil' attack with downvotes (stifle your laughing I'm trying to be serious!), shouldn't their explanation be visible?