@Rach El
To be 'fair' there's not much of interest a camera is going to be observing especially on a long haul flight - just a passenger sleeping or watching a screen!
You're only imagining the most benign scenarios. How long before you record a cheating couple kissing? Knowing who flies first class could be useful information to criminals when it comes to picking targets. What if terrorists were to use it to help identify Air Marshals? Big data can lead to big problems.
as for the Tesla, why one needs a camera inside the cabin is beyond me
It could detect a sleeping/distracted driver, and/or verify they really have their hands on the wheel while in auto-pilot. The legitimate uses are not the issue, though. The problem is that the damage from abuse can exceed the benefits. Even just the question of who benefits can be an ethical nightmare. What most thinking people are unhappy about is that the panopticon isn't really being put in place to help them, but rather to help corporate/government/criminal interests.
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