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The "fasten seat belt" sign is just advisory. You can still get up when it's on if you need to for whatever reason.
From FAR 121.317:
(f) Each passenger required by 121.311(b) to occupy a seat or berth shall fasten his or her safety belt about him or her and keep it fastened while the "Fasten Seat Belt" sign is lighted.
WebTV, which was pretty much the same idea in a set-top box, was in development at the time, and provided a model for that kind of thing, so Mitsubishi announced that they would, at some unspecified point, begin selling TVs with a feature they called "Diamond Internet" built into them.
It never happened. I don't know whether the issue was politics in the software department, or maybe just management recognition that it was a gimmick, but they never delivered such a product. Probably it came down to there just being too many other issues to manage to get an ATV set out the door.
However, it's clear that the idea's been there, lurking in people's minds, for the thirteen intervening years, and hasn't become any more useful a concept.
Incidentally, around that same time, I did buy a wonderful set-top-box by a company called Videoguide, that delivered TV schedules and news headlines to the device via unused text pager bandwidth. It was a great product, inexpensive and very useful, as even though I did have internet at home at that time, it wasn't an always-on connection. However, between shortened times to come out of sleep for laptops and PCs and the ubiquity of always-on internet connections in the home, I think the utility of a product like that isn't what it used to be. And anyway, Videoguide ended up getting bought out by Gemstar after spending tons of money.
Not surprised you didn't turn up positive on the test. I'm pretty sure those target specific high explosive substances that could be used in small amounts to bring down an airplane, and are not intended to detect common low-explosive propellants like gunpowder.
Recently, my i-go based pocket pc navigation unit was stolen. However, I still retained my valid serial number, certificate of authenticity, proof of purchase and even a backup of the software. I figured restoring my software to another device should be a matter of unit service or (tops) minimal fee for media restoration. Tech support, however, had other ideas in mind. They informed me that my license was stolen with the unit. No amount of explanation of the lack of logic in that statement made through. They insisted that my backups were also void because I no longer have the original SD card and that I am not allowed to use them (which kind of defeats the whole purpose of backup, as the device only stores extremely little other data than the original software — no more than a few points of interest and marginal settings)."
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What about the privacy of ordinary people? Mainstream media like the BBC and CNN always uses soft terms like "privacy concerns" to make it seem like a "well it isn't very nice, but its hardly a hard crime" thing. But is this actually the case? Does having to have your likeness recorded for an unknown period of time by CCTV cameras when you go for a stroll past some shops, or having your IP logged by each website you take a glance at not "take" something from you? What about datamining, where computer algorithms try to "figure out" where you are in the world, what kind of person you are, what your interests, consumption habits and preferences look like, what you might be likely to buy or spend? Again, does this not constitute "taking" something from you that you have not voluntarily provided? Would you shop at a creepy record store or bookstore where some scientist in a labcoat follows you from shelf to shelf with a clipboard and notes down the exact time you looked at items, the sequence you looked at them in, and some information that lets the shop know that you, not some new customer is back and browsing for more? Would you consent to bricks and mortar shops coating sidewalks with a special substance that makes your shoeprints stand out in bright colors and let them figure out where you came from or where you went after you checked out?
Is it not "theft" to take something a person cares about and cannot get back once its taken? Is it not "theft" to force a person to leave an "imprint" of their presence behind with every digital step, no matter how casual or insignificant? To record someone's activities as if its "normal" that every step you take should be recorded in some way and become the property of whoever recorded it? To whisk someone's data into some database at a datacenter where the person who effectively OWNS the data will never see it again?
And would labeling privacy invasion "theft" or "stealing" in daily discourse be an effective way to corner those organizations, digital or not, that trample on people's privacy without appology? Should we remind mainstream media organizations that use fluffy terms like "privacy concerns" to add that "privacy infringement is in fact theft"? Should we treat companies that don't take privacy seriously as "thieves" and openly label them as such?"