People Who Think Opinions Can Be Wrong have realized that opinions, despite popular belief, can indeed be wrong.
If you have an opinion that is based on your skewed and/or otherwise warped personal experiences instead of one based on well thought out research, your opinion is invalid.
Keep in mind, however, that "opinion" is different from "taste."
Example A:
"I think that Britney Spears is a more influential musician than Mozart or Bach."
This is a wrong opinion, it is neither backed up by research or facts. Anything coming out of this persons mouth you should take with a grain of salt.
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).