Here's why:
* Informal environment: WikiAnswers is meant to be a casual platform where people can ask and answer questions quickly. Strict rules about punctuation might make it less accessible for people who aren't comfortable with formal writing.
* Focus on content: The emphasis is on providing information, not on perfect grammar. Punctuation is secondary to the content of the answers.
* Ease of use: Requiring proper punctuation might add an unnecessary hurdle for users who want to ask or answer a question quickly.
However, this doesn't mean that punctuation isn't important. Using correct punctuation makes writing more clear and understandable. While WikiAnswers doesn't enforce it, it's still a good practice to use punctuation when writing, even in informal settings.