The biggest problem with ID is that it IS taught, as a statement of fact, and taught to have as much validity as evolution. Provided your belief system doesn't mean you stone schoolchildren, confine people in concentration camps, summarily torture and execute them or blow us up, then your belief should be pretty much up to you. If held honestly, I may even respect you for it, despite my disagreeement (and a slight feeling that you may be self-deluded).

School is different. People should be taught to think (contrary to much religion), to question, and not to trust or follow charletans, bigots and liars. ID says "for the big questions, take it on faith, and my say-so. It's too difficult to think of something different". No.