I think the biggest myth is that foods are 'good' or 'bad' for you. I try on base my diet on:
1) how many calories I should eat in a day / week.
2) getting the proper balance of protein to fat to carbs.
3) knowing what kinds of fats I'm eating and shying away from animal fats.
4) eating to keep low levels of sodium, and higher levels of electrolytes.
5) opting for complex carbs - like squashes, sweet potatoes, over wheat flour based carbs.
But all things, even butter can have a place in your diet. I just know if I have butter on my toast (a proper serving not a paper thin shaving) I've had all the fat I should have in a day.
So, the upshot of all this is: read the label, and if coconut oil is low in saturated fats, it's OK. I find it often helpful to compare it to an alternative or two; like compare it to safflower oil (one of my favorites, it's great for high-heat cooking and it's from a seed, so you don't have to worry about clogging your arteries).
And I'm one hundred percent sure, even without looking, that coconut oil is not as "bad" for you as butter. I'm guessing you could eat twice the volume for the same number of calories, and still not clog your arteries. - but like I said I didn't check the numbers.