Well, Apple has not gone after 9to5mac, or Macrumors, or TUAW, or Appleinsider...
This is not about "censorship" or anything close to that. Apple is more than ok with rumors, hype, rumor sites and all its fans buzzing and freaking out with the possibility of a new product being released. That said, it happens to be that secret product information being leaked is a MAJOR threat to a company like Apple that can't live on huge installed user base.
Apple lives on innovation and on the "OMG" factor of their product releases. Just put the Thinksecret lawsuit into perspective, and take a look at the time frame. Apple was developing the iPhone at that very point in time. Guess what a leak of the multitouch interface of the iPhone would have meant for Apple and the most-anticipated-product-launch-ever? Had Thinksecret's source been around leaking info about that before Jan 2007, LG, Samsung, Nokia and the likes would have had waaay enough time to develop an iPhone equivalent even before Apple's came to light. The iPhone would have been dead before launch.
This is just a small example of what happens to a company that bases its success in being innovative, sleek designs and secretly developed gadgets. TS was walking the line, and Apple can't just afford such a danger. Rumors are okay - allowing your inside secrets to be leaked and thus destroy your product marketing schedules and timelines is stupid, and really dangerous.
Anybody remember the iWalk? Or the much-rumored Asteroid audio interface? These products really seemed to be almost finished... but they never were launched because timing was destroyed by leakages. I'd rather have an iPhone today at the expense of ThinkSecret having to stop leaking insider secrets, than being able to read about it in TS in Nov 2006 and Apple losing its wow-factor and its opportunity window for the launch.
A fair agreement is "Rumor sites: guess as much as you want about my products, make up fakes of any kind... but please do not post stolen pics of imminent products or I will ask you to take them down... and do not by any means post secret info -again, be free to guess- of my current product developments or I will be forced to take you to court.
Guessing that Apple was to release a phone was something that everybody did. I can clearly see TS being able to post "Apple about to release Ipod-like, fullscreen phone with no 3G capabilities, integrated WiFi and camera, and multitouch interface" in mid-november had things stayed as they were. And apply this to any other product: iPod Touch, Leopard's Time Machine, and whatever they're preparing for MWSF08.
Sad to see TS go, but if you play with fire you will eventually get burn. Other sites never crossed that line, and well they are now.