The Wikimedia Foundation gets only 2 stars (out of 4) on Charity Navigator's "operational efficiency" rating, and it's because the program is inherently a fraud. It takes about $1.2 million in server equipment and bandwidth to run Wikipedia, yet their budget is now approaching $10 million. Ask yourself, why is that, and why is this Foundation's bank account growing by $2 million per year?

Time to read up, people:

http://www.mywikibiz.com/Top_10_Reasons_Not_to_Donate_to_Wikipedia