http://patents.stackexchange.com/
This site is exactly for this reason: raising patent questions with the goal of identifying bad patents.
"Ask Patents is a question and answer site for people interested in improving and participating in the US patent system. It's built and run by you as part of the Stack Exchange network of Q&A sites. With your help, we're working together to find Prior Art on dangerous and overly broad US Patent Applications before they become issued Patents. "