For an example, check out the Defcon 22 talk Hack All the Things[1], page ~61. NTV200-100NAS owned through unsigned updates....
[1] http://download.gtvhacker.com/file/generic/GTVHacker-DEFCON2...
We got your initial point..
I think you're just grinding metal at this point.. Ease down.. ease down...
For me it's a matter of principle. That people politely ask is both an indication of trustworthiness and how I prefer things to be, so I try to help by enabling it.
It also depends on the way they ask. Mozilla Firefox for Android tells me that I should choose what I share, enabling crash reports and disabling telemetry by default. Even though the crash report is technically opt-out, they ask me in clear terms. I like that.
It's like you didn't even read what was written.