There's a thing called the International Trade and Arms Regulations (ITAR), which has a tremendous amount of bearing of what can be openly discussed regarding UAV technology. Then the State Department, which has a lot of oversight in ITAR related distribution of products and information, and in UAV technology, has some control authority. The Department of Defense has some oversight in the area of UAV's, and a lot of interest, along with Homeland Security.

Now if anyone thinks that the FAA is the sole governing body that has control over airspace and UAV regulations after seeing the heads up in the first paragraph, well, you're on your own. Don't read the FAR's and think those are the only regulations that apply to models, flight, airspace, and UAV's. There's a whole bunch of various regulations under different governing bodies in place that you have to look hard for to become truly enlightened.

You have to be very careful about what you openly discuss on an internet forum. Failure to do so means you may get to suffer the penalty even if you don't know the laws and regulations. Open internet discussions of things like advanced auto pilot technology, advances in gps accuracy, payload development and operation, certain telemetry methods, uploading pictures of secure areas and operations, electronic developments, and such can put one in close touch with a legal system that will show no mercy.

Then again, most people directly involved with UAV development and operations are bound by secrecy clearances and agreements through our government and non disclosure agreements with the companies involved.

There most certainly are UAV forums where the technology is discussed, but not openly unless it's a site restricted to those with special access.