"Experts" in Yahoo Answer giving Members dangerous information. Is that ok?

Dangerous and sometimes stupid. I recently saw a computer one where the " expert" suggested the only answer to a problem was to format the hard drive. The asker was at Uni and needed the work of his drive desperately. If he had followed the answer he would have lost it all. One of the problems on sites such as this. Wikipedia is similarly flawed as so many can alter it.