Yes, it appears that Groucho43 is giving his "personal opinions" to certain questions.
opinions
Personally, I like giving answers. All of our supervisors like giving answers, and our dedicated contributors do, too. They wouldn't be on WikiAnswers all the time if the didn't like giving answers.
You know when you are giving inaccurate answers when you don't know the answer. If you believe you sort of know the answer, but don't really know it, chances are that you are giving inaccurate answers. It is up to you whether or not you know when you are giving inaccurate answers.
Not a single person - there are many thousands of people contributing to the site.
anybody
What was the question
Attorney General
Random people who know the answer and that are signed into Wiki Answers.
the expansion for google is Giving Opinions and Options Generously Linked Everywhere
By giving free rein to diverse opinions.
Giving answers is cheating and Wiki will not help you cheat. It is time to get to work and figure out the answers.
By winning loads of awards or by giving the most answers or the best answers.