Yes they most certainly can. Every single point of view in life is an opinion, some opinions are right because they are based on fact, and others are wrong because they're based on falsehoods or just simply aren't backed up by the facts. Opinions very much [i]can[/i] be right or wrong. Saying the grass is green is an opinion, one that is based off of fact, but an opinion nonetheless.
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If it's based in fact, it is no longer an opinion. It is fact. Please look up the definitions of the words before trying to school me on english. " the term opinion may be the result of a person's perspective, understanding, particular feelings, beliefs, and desires. It may refer to unsubstantiated information, in contrast to knowledge and fact." -- http://en.wikipedia.org/wiki/Opinion. "In general, an opinion is a judgment, viewpoint, or statement about matters commonly considered to be subjective, i.e. based on that which is less than absolutely certain, and is the result of emotion or interpretation of facts." If what people are saying about Destiny are wrong, they are not opinions, they are misinformation.