Thesis 77
Everyware must be deniable.
Our last principle is perhaps the hardest to observe: Ubiquitous systems must offer users the ability to opt out, always and at any point.
You should have the ability to simply say "no," in other words. you should be able to shut down the ubiquitous systems you own and face no penalty other than being unable to take advantage of whatever benefits they offered in the first place. This means, of course, that realistic alternatives must exist.
If you still want to use an "old-fashioned" key to get into your house, and not have to have an RFID tag subcutaneously implanted in the fleshy part of your hand, well, ...
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