Facebook lets you control your public keys as if it were any other information: public, friends only, etc.
What is the problem you are eluding to?
There are GPG plugins for the web client but I have not used them.
b) It's worth encrypting everything. This protects your data not only from the spooks, but from gmail/live/your ISP/whatever free client you may use.
>In fact I may enable a bunch more useless notifications and set up a rule to delete them at my end as they arrive.
"Hey Bob! Looks like we need to ship some anthrax to Korea."
"Ok! Did you make sure it wouldn't kill us before we start handling the samples."
"Does it really matter?"
"... No... I guess not..."
Russia would like for us to continue gifting them with cash for 40-year-old missle motors, it's our own government that doesn't want them any longer. For good reason. That did not cause SpaceX to enter the competitive process, they want the U.S. military as a customer. But it probably did make it go faster.
Also, ULA is flying 1960 technology, stuff that Mercury astronauts used, and only recently came up with concept drawings for something new due to competitive pressure from SpaceX. So, I am sure that folks within the Air Force wished for a better vendor but had no choice.