If your accountant offers advice on your taxes, you pay attention, but when he starts to advise you about your cancer treatment, you may not pay as much attention.
Anybody can have an opinion on anything. But only informed opinions advance real discussion.
On today's Statewide Talkline, I was criticized by some for not allowing people to express their opinion. But when your opinion is based on false facts, the opinion can't count. When several folks told me the health insurance reform proposals would send government agents to old people's homes to see if it was time to die, I refused to allow them to play. I told them they were wrong, cited chapter/verse that showed they were wrong, and discounted their opinion.
It may be harsh, but it's necessary.
"Well, Howard, I don't care what you say, that's what I BELIEVE". OK, you believe a lie. You cannot use that belief on my show and leave an impression that your opinion has any validity.
2 plus 2 equals 4 (in base 10). Period. You may BELIEVE it adds up to 5, but it does not.
Not all opinions are created equal.
Too many talk hosts decline to remember that.