Wow - these comments are wackier than anything I have ever read in Wikipedia. 1. Using XKCD as a source for academic malfeasance. 2. Thinking that encyclopedias should be/are written by a single individual. 3. Wikipedia's editorial policies result in the amplification and ossification of (political, academic, medical, etc.) establishment narratives and standards, which are often corrupt for a wide variety of reasons. 4. Wikipedia is anti-useful.

I'll add my own.

Wikipedia causes halitosis and ED.

Before Wikipedia people did not have to evaluate their sources.

Wikipedia is causing the culture wars in the US.

Kids should be looking things up in the card catalog because it teaches patience and persistence.

Wikipedia articles don't cover the topics in depth......