Trusted Computing (TC) is way more dangerous than classical hardware backdoors. I consider TC an evil technology because it not only takes control away from the user but it even allows to inject faked evidence into computers which could make innocent people -- independent journalists, political activists etc. -- suspect to crime.
TC could also be used to delete evidence from computers of journalists who would have no power to keep it. TC allows to control people without letting them even know about it. TC is a huge danger for freedom of speech. It should be banned politcally and boycotted in business. My recommendation: Don't buy consumer hardware but use embedded Linux systems with bare bone technology.
If we want to be truly secure from being spied then we must do a complete restart with new hardware and software from scratch. There is no way around.
I am actually "glad" about the NSA scandal (thank you Snowden) because it woke people up and made them aware of the reality of global surveilliance, and about the huge threats of Trusted Computing. NSA should be controlled by the people of the United States but obviously it has become out of control. This single NSA case has silenced the mouth of the conspiracy mockers once and for all.
Before the Snowden leaks, you'd be hard pressed to find a technically-minded person arguing that the NSA doesn't have, at the least, the potential to have their fingers in every pie.
Since Amazon deleted all those copies of 1984 from everyone's Kindles, I don't keep mine connected to the internet. If you have data, you can keep it. Keep it on your own devices.
What? When? Seriously?
Meanwhile you could google around for "Linux embedded systems".
Consider it a "dual system" mainboard with the usual hardware where you have full control, plus a controlling subsystem where you have no access at all. Everything could be done remotely but you couldn't see any evidence.