Please do not downvote marcoperaza's post because you disagree with it. That goes against the spirit and intent of this site. Make your own argument to counter instead.
PG said:
> I think it's ok to use the up and down arrows to express agreement. Obviously the uparrows aren't only for applauding politeness, so it seems reasonable that the downarrows aren't only for booing rudeness.
It's a bit weird to impose your own (admittedly popular) purpose of the vote buttons, claiming that your view is the true spirit and intent of the site, when there's a quote from the guy who set up the site directly contradicting you.