When someone see your facebook profile page the questions you have answered will be visible to everyone. There is no problem with persons they don't care what they have answered and how others feel about him. But the people who cares some privacy need to have hide their answered questions. For example you might have answered for the question "Have you had sex with someone ever before marriage?". This answer will be visible to everyone unless you have hide your questions and may affect you in future. Hiding your unnecessary answered question will be wise to keep your privacy information well and good