I'm not even gonna vote because I'm tired of all the whining about the rating to be honest.
I don't get why people care so much. Maybe they had a popularity problem back in Highschool or something, and it's coming all over as a grown up on an internet forum, I don't know.
Perhaps that fecker deserves one back.
If you don't randomly rate, then if he/she really deserves one back I guess he/she would get it by the quality of the post only, not from the name on the post
As for me, I usually give + when people try to be funny and they were really funny. I think this saves a lot of quoting followed by the annoying LOL.
The -'s I usually don't use them, I think the only time I used the -'s was when someone with multiple IDs was posting and giving himself a lot of +'s, just for the sake of driving him a little bit crazier. When I disagree, I'd rather speak up.