ok fine. Gabriel Giffords shooter posted pictures and details on his MySpace profile prior to the assassination attempt.
And for people like Colleen LaRose or the Underwear bomber, just a web browser and plain-old internet led to the apprehension. With Michael Reynolds, traditional "law enforcement officers posing as honeypots" style did the trick.
These classical methods seem to be working quite alright.
What is the use-case here? Some dastardly secret terrorist conspiracy where they collaboratively make detailed plans, over the internet, in clear text, like this:
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From: evilbomber@yahoo.com
Subject: Re: RE: re: re: Re: Secret plans
To: confidant@not-the-fbi.com
CC: coconspirator@gmail.com, evildoer2213@excite.com, bombmaker@msn.com
Attachments: annotated-map.pdf
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Hey all,
After reviewing the bombing plans of the terrorist attack next Tuesday, set for Washington DC, when the Secretary of State, Jon Carey, is set to arrive by motorcade at 4:15 PM, I've decided that our assassination attempt (where we plan to Kill Jon Carey) would be best suited for a different intersection.
As you can see here, there is a better place to bomb the motorcade.
Also, I've gotten all the parts for the IED. This includes the incendiary, a timer, and all the wiring necessary. I carefully asked a bunch of questions on various open forums and posted pictures to confirm I made everything right. I also disclosed my intended use of the bombs along with my radical political leanings.
Anyway, Down with the USA, and I hope to meet all of you to make this death of a US diplomat a reality, next Tuesday, at 4:15 PM.
Patiently Awaiting Martyrdom,
evilbomber.
P.S.: What's encryption?