No, you will be blocked from the site for that.
An ID is an unregistered WikiAnswers user, and is a guest contributor to WikiAnswers. Any guest is allowed to ask or answer questions, and it is just part of the rules.
Questions about illegal downloading are not allowed at WikiAnswers.
There is no limit on the number of questions you can ask; the more the better.
Answers allows a question mark at the end. This is automatically added.
WikiAnswers doesn't 'block' inappropriate questions, but rather stores them so no one can answer an inappropriate question that has already been asked. It is called a 'Catch-All', and it stores all of the inappropriate questions so when a user types in an inappropriate question that has already been asked and merged into that Catch-All, they will get an answer telling them that inappropriate questions are not allowed on WikiAnswers. In a way, WikiAnswers does 'block' inappropriate questions.
Yes there's nothing wrong with asking as many questions as you want to provided that they're within the rules.
Yes they do. You should be Notified or you can easily look. Contributors are allowed to answer their own questions if they can give reasonable answers.
No, you do not have to be 18 to answer questions on WikiAnswers. In fact, you can be any age and still be allowed to answer a question on WikiAnswers. There is no age limit to sign up for an account and contribute to WikiAnswers, but there is an age limit to join a program.
Because the purpose of the website is to create a common place for people who have questions and people who have knowledge to interact with one another, by asking and answering questions. If unwanted/unnecessary questions are allowed, the main purpose of the website would be defeated. Hence, they are not allowed
Personally, I don't know who Raichu is, but there are no opinion questions on WikiAnswers allowed.
On WikiAnswers anyone can answer any question, so long as they answer honestly and correctly.
Yes, humor is allowed in the Humor and Amusement category of WikiAnswers, elsewhere it isn't generally allowed.