I think all of the examples given are at the extreme end and quite exceptional. If it was all so hush hush then certain people ought not to be reminiscing quite so much on the ATC thread having signed the Official Secrets Act. The intention was plainly to stop you blabbing about what you got up to back in less open days but yet the stories continue to be told on a public forum?
Why? Because there's no harm in it and people enjoy hearing them. Now, perhaps there's an analogy.
I agree that there is however a rather odd subset, more so on airliners.net, who seem to get off on 7700 sqawks and compete to be the first to post as if there was a competition. Of course that may come from software monitering as well. Nought so queer as folk.