Is Blubbatron for real?
Why do patents exist? Why do some fields of science routinely publish journal articles that are exceptionally vague on methodology when working in a new field?
Once you know how something was made / done / stopped / anything you can EASILY recreate it / make it better / insert analogy here.
Advertising every foiled plot would a) incite panic on a level you could only imagine b) create an open source how-to book for getting around the governments defenses.
Jesus fuck it sure is 'tarded up in here. There are a couple thousand people, maybe couple tens of thousand (but probably not) actively working on the defense of the US at a level that actually matters on any given day. If we publicized every foiled plot that means that there would be literally millions of people dreaming up potential plots, using what didn't work as stepping stones / info on what the government has the resources to do vs. a few thousand dudes who were just really good at math and logical reasoning brainstorming potential threats that might need to be thwarted.
Stuff like the shoe-bomber is publicized and made national and put in big giant print because not only was the dude a fucking moron, but the plan was so ridiculous that it has very little chance to be repeated. Government shows the people and says "look we stopped it, but to protect you in the future here's some sugar pills in the form of TSA screening" and goes about their business. Nobody is going to build off the thwarting of the shoe-bomber. And besides, any person with a high school degree who wants to inflict massive loss of life just needs a handgun and a mall on a Saturday night or a NYC subway car on Monday morning. You don't need a shoe bomb to be a terrorist.
All that said, if every time we thwarted cyber-terrorism or bio-terrorism and said "HEY LOOK AT US" it only exposes more holes in the defenses of the country.
Hell, I'm going to go even further and FFXI analogy this shit since this still is BG: Back in the day, how were new HNM like Tiamat / Shadow VNM Dragon / Dyn Tav etc won? By people getting fucked in the face (failing) and sharing the data on what DIDN'T work and people tried new things until something DID work. If nobody ever shared any data, and no knowledge of what didn't work was passed around, do you think it would have taken more or less time for them to become routinely farmable across all servers?
Analogies motherfuckers, I got acres of them.