I am constantly on students’ cases to not use Wikipedia as a primary source (or as their only source). They whine and throw around very outdated (and wild) statistics about how Wikipedia is vetted.
No wiki with unrestrained access can be vetted.
My students will cry in the fall, though. Wiki’s own creator has now said that Wikipedia is little more useful than a printed encyclopedia and should be used in a similar manner, not as the basis for citing in a paper, but for uncovering good primary sources.
I can’t help but cheer!