Where I do agree with nurizeko that negative opinion works where people are responsible enough to use it propperly, it does backfire when you have someone who just doesn't like what you happen to say. Generally speaking my rep is 99.9% okay, but I've gotten one negative rep from someone ages ago who no longer posts simply for questioning what it was his point was in a rather oblique thread he wrote---
I think I prefer that admins simply take a vote and remove posters who prove themselves to be too imature to write on a public forum without managing to insult every person who happens to cross their path--- and I am refering to a few people who have been posting recently... one or two have been removed already, and time will tell what happens to the rest.
Where I do think that age does dictate your ability to compose a half-legible sentence, there's not much you can do about that--- At the moment, there are certain people whom are frankly damaging to the quality I think is inherant to Jref which has been built up by the many fine people who have contributed here.