I've often said that if you need to censor the opposite opinion then you opinion is a bad one. However, if you are talking about the censorship of profanity rather than ideas per say, then it is perfectly fine. However, if the profanity is used in the proposal of an idea around adults, then to censor them is just as bad.
Assuming you meant censoring people with other political ideologies I think this is correct. After all, the only reason I see to censor the opposition is if you struggle with defending your own ideology. This sounds like a symptom of lacking confidence in yourself to me.
No, censorship is only there for younger audiences or those who prefer not to hear/see inappropriate things. I doubt this has anything to do with "lack of confidence", but I may be looking at the wrong perspective.
No it represents a society that values weak people's emotions over factual discussion.