No, it is absolutely not OK. It creates more work for other users. When you are caught by the Vandal Patrol, the consequences are either a warning or an immediate block. They can also track you down easily and learn a lot about you.
See the related link below. If you scroll down, you'll see what types of things people who vandalize the site do.
Some people think of the site as a joke an feel that it would be funny and amusing to vandalize the answers.
They think that it is funny or fun to vandalize wikianswers, but they could get easily blocked by supervisors if they do.
This would be an impossible number to come up with, just know that if you choose to vandalize this site, a member of the Vandal Patrol will ensure that it is something you don't continue to do.
No, a computer doesn't answer the questions here on WikiAnswers. There are literally thousands of live people all over the world who are members of the Wikianswers Community answering questions as well as editing questions and answers. Many members of the community also spend time monitoring the site for vandals - those who come to WikiAnswers to destroy or vandalize the site content - and block them permanently from the site.
There are many people on the site that try to help you and others with there question but you have to realize that there are some people on this site that just like to vandalize questions. It really just depends on who is answering your questions, when it comes to how trustful the answer is.
The two main reasons for contributors to delete an answer on WikiAnswers and save it are to remove "bad" answers or to vandalize.
We had a lot of people who were creating account after account just to vandalize the site. Requiring a valid email address ensures that vandals cannot do this anymore.
You probably think that WikiAnswers isn't fun because Supervisors won't let you ruin the site and vandalize it any way you want to. It is plenty of fun for most of us non-vandals.
WikiAnswers itself technically does not lie. However, there are some users that decide to vandalize, spam, or put incorrect/inappropriate answers into questions.
You aren't the only one. Many people seem to hate WikiAnswers because they couldn't vandalize WikiAnswers. There are more people who like WikiAnswers than hate.
Like all "wikis", WikiAnswers is open to all who would like to contribute. Though not all have bad intentions, some do purposefully try to vandalize this site. This causes some viewers to not completely trust what is posted at WikiAnswers. WikiAnswers cannot always be trusted (especially) with opinion questions, due to its openess to anyone, who have the ability to change the answer.