I'll only say this much about the Mary Sue:
It never ceases to both amaze and amuse me that certain people will cite them as a credible source, and, at the same time, immediately demand that sites that are even middle of the road politically are considered untrustworthy by the same. It's like the ultimate in double-standardry.
If at any point on a Wiki someone citations a Mary Sue article and the citation isn't specifically about the Mary Sue fucking up or the like, you can safely write them off as knowing what they're talking about. Bank on it.