Which are edited by what? 3 people? 10 people?
All sources of information have varying degrees of unreliability. Personally, I trust well-cited Wikipedia articles more than I do most books, journals, and other more academically accepted sources.
This "don't trust Wikipedia" story pops up in various places a few times a year. It just reeks of a bunch of academics trying to justify their existence and shouting at kids to get off their lawns.