That alligators are dumb, and always hungry .

I am increasingly disturbed by the notion that it is ok for the religious to believe in their gods and doctrine. Something I believed for a long time. This passive stance on what amounts to a hereditary delusion should be actively combated. I don't mean that anyone should be persecuted because of their beliefs, but that it is not ok to "agree to disagree" any longer. I feel that religious belief is the #1 cause of the world's ills. In most cases not even 'faith', but the perception, or deception of righteousness, the rationalizations provided by scripture in all faith traditions. All mystical and spiritual excuses for humanity's rotten behavior should be brought into the bright lights for thorough examination, so they can be left to wither and die.

that butter needs to be refrigerated
that you can catch cold by being cold

I'm not sure how common this misconception is, but I was recently accused of being a Satanist because I'm an atheist. It took some doing to explain that for the same reason I don't believe there's a god, I also don't believe there's a devil.

That there is a god, or are gods.

Here in Australia, a great majority of people still think that the country was "discovered" by Captain James Cook, when in fact it had been continuously inhabited for at least 40,000 years by the Aborigines.

that their opinions matter

In my opinion when faced with bodily harm people are stronger mentally and physically than they think they are.

That humans are in any way special. Check yoself, bitches. You're just sacks of chemicals and energy. Morality, meaning, purpose, souls, love, "intrinsic value". Even the most secular renditions of these concepts are nothing more than abstractions to puff ourselves up. All of these words are just the hype. You're the most intelligent monkeys in a pale blue dot - and that's it. Always remind yourself of that.

That nicotine is dangerous to health.

that there are still many things in the world that can't be explained by science, because they can all be explained, it just needs some one to take the time to look into it. people like Randy the Magnificent.

One that comes to mind is the myth that everyone believed the earth was flat when Christopher Columbus sailed across the Atlantic Ocean and that he proved the earth is round. That meme just won't die.

That not believing in god means I worship the devil (also something I do not believe in.)

That water goes down the plug hole clockwise in the northern hemisphere and anti-clockwise in the southern.

The Sun rises in the morning and sets in the evening.

There IS a god (or an Easter bunny, Santa Claus, tooth fairy, or some other make believe person(?))

Many people automatically assume that if a person is a devout worshiper that they are a good person.
I think most of us here know that's not true.