Just like the title says. Myself and a few other users have used Wikipedia as a reference while others use IMDb/articles/etc.
We should establish here and now if this is a valid way to reference points/answers or not.
My personal beliefs is that Wikipedia is not as bad as everyone says with referencing items and should any doubt arise, a person can simply use what the statement's citation for where the quote/idea/source came from and by that regard, still make the point valid.
Also something that should be decided here is what we can/can't use as a reference. Do we restrict to IMDb or is any credible movie reporting site valid. What qualifies as a credible site, etc. All this should be in our FAQ as well so that we can instruct new users who want to answer questions.