for every christopher columbus type person, there may be 99 like him with beliefs that really are false. but if you stop these type of people from thinking outside the box, you may lose the 1 who really is on to something. this is why i hate censorship and i don't like people who are not tolerant of others. yes, people with radical opinions may be wrong, but if you stop that TYPE OF THINKING, you lose the good ideas, too. this is obvious in civilization. look why america and similar countries flourish. new ideas and free speech are (supposed to be) welcome and encouraged. maybe in iraq 700 years ago, they'd kill you if you said the earth revolved around the sun or the koran is BS. societies that don't tolerate new ideas and unpopular opinions don't advance too good.