The reason why some Supervisors or CA's may lock your question is because it is prone to spam and vandalism.
Answers can only be locked or unlocked by a WikiAnswers Supervisor. Answers are "locked" in cases where an answer has become a debate instead of an answer, or if the answer has been vandalized too many times. If a question has been locked for either of these reasons, it may be unlocked after a time, or may be kept locked if the question continues to be a target for vandalism or debate within the answer.
You ask a supervisor of that category the question is in to do it and give good reason.
I assume that if a question is locked for answering by someone it is not available for another to use it.
WikiAnswers is important because it is a question and answer website and it answers questions for everyone everywhere. A lot of question and answer websites don't allow you to edit answers but WikiAnswers allows you to edit any answer as many times you want. Once the answer is perfect and percise, the answer may be locked by a supervisor.
To remove an answer, you can click on "Improve answer", then delete whatever you do not feel is appropriate to the question asked. If the question is locked, you can ask a Supervisor to remove the answer for you if you still believe that whatever material is contained within it is not appropriate.
Some questions attract vandalism, when people change good answers to nonsense. Therefore, those answers are 'locked'.
Yes, you can submit a question without an account on WikiAnswers.
Yes. You or anyone else can change an answer on WikiAnswers. That's the whole point of a wiki. There's an "improve answer" button under an answered question. The exception would be an answer that's locked.
Yes, WikiAnswers is a Question and Answer community.
The question you asked is inappropriate for WikiAnswers.
this question
Any time is the best time to ask a question on WikiAnswers.