Indeed we should, although it would help if we either
Post here about any errors or blatantly incorrect information that we notice, instead of rely on the psychic powers of our fellow fans.
Fix our self any issues we encounter (just click edit), or if you are uncomfortable with editing note it on the discussion tab there (or here).
After all there has been a lot of changes since the project start and beta release, and many will follow with game and sourcebooks release. The Wiki as community resource rely on us.
As Tort pointed out, it'd be helpful to at least flag out-of-date information so someone can come behind you and update it. I have created a template to help with this. Just put {{Outdated}} at the top of an article that has issues and that will add it to the Outdated articles category so we know what needs to be fixed. Adding a reason would be even more helpful: {{Outdated|Resolve now affects Concentration, Deflection, and Will.}}