yes, of course. because people have different veiws and opinions on what they like or beleive in or think what should be taught. for instance, you wouldnt want your kids growing up being taught by the kkk being brought up as racist killing idiots? even religion being taught is tricky, because parents are allowed to either be for kids being taught religion or be strongly against there kids being taught certain religions, some things like that can be overcame, but there are certainly a lot of ideas, like disgusting hatred filled ones (the kkk's ideas, hitlers ideas,ect) that are just too dangerouse and downright disgusting to be taught, unfortunantly everyones entitled to freedom of speach, but when it crosses the line, its not good
It depends on the topic and where its being discussed and how the person is discussing it. Theres a time and place for everthing and while we have freedom of speech and you can openlly talk about orr discuss any subject you want to, its not appropriate in all situations. Discussions should be limited for safety reasons in places such as schools or with younger children for example.
well it depends on what type of idea. anything to do with religion results in dangerous situations if you think about it like wars, mu.rders, rampages, etc. but if you mean something like coming up with a new product or art, something along those lines, then I dont see how it could be dangerous.
Have you never seen Harry Potter?! "He Who Must Not Be Named" was a pretty touchy subject for those poor wizards.