Yes, you should.
Yes, you should be nice when answering questions. The nicer you are, the more likely you are to get more trust points and recommendations.
You could plainly state that it is your opinion i/e: In my opinion, I should have something better to do than be setting here answering questions on Wiki Q&A.
Because its a good thing to help others
Yes, starting a sentence with "then" is grammatically correct, especially when showing a sequence of events or actions. However, it is usually used sparingly to avoid overuse and maintain variety in sentence structure.
at the top of the first page
Read the stem
You should answer questions because it is a way of communicating. Answering questions may clear up any misunderstandings and may even educate someone further.
No. The proper way to say that sentence would be "The culprit should be only sentenced to death. " BTW what you want to ask is if it is a PROPER sentence.
You did a proper job of it.
Well, I'm answering your question right now: Keep on askin!
Inspector Clouseau is world-renowned as an inept policeman. He is so inept that he becomes dangerous to those around him.
no, it is not a proper noun, it is a being verb, meaning it should be lowercase if in the middle of a sentence.