What types of questions were you not allowed to ask?

Earlier today I read an interesting article and tweeted:

4yos ask questions, 6yo have learned that teachers value right answers more than provocative questions
Then I shared that I was once banned from asking questions in a physics class because the teacher didn’t know the answers and thought I was trying to disrupt the class. (My question asking status was reinstated after the teacher talked to my awesome math teacher and got confirmation from her college professor that the questions really were hard questions without answers.)

I’ve been amazed at the number of really smart people who have shared similar stories!

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Do you have a similar story to share? How do we help today’s kids not run into this?

For my part, I think I kept asking the “hard” questions because my parents and my other teachers were so supportive.