I would absolutely love to have control over HTTPS traffic on my network, specifically to enable my Squid proxy to cache HTTPS pages, but unfortunately not every device or even program supports custom CA's. I'd be the man-in-the-middle between the internet and every device I own.
I think that is a pretty user-hostile attitude and I suspect you probably wouldn't really love it if every network operator was doing that kind of thing.
Yes, but my point is that if you feel it's justified for your own network then you ought to expect every other network operator will feel that way about their network too.
So before applying that mentality, it would be wise to consider what your experience would be like if all your neighbours, friends, colleagues etc also did that on their networks.
Is the point that I sometimes use these networks? Then I somewhat agree - I would set up a separate guest network without shenanigans for guests to use. This avoids both the ethical sketchiness and having to explain why their web browser is shouting at them
True, that could be a good compromise. Although there are still some disadvantages like creating an SPoF for yourself and increasing your attack surface (e.g. anyone who compromises your internal CA has access to all your encrypted connections)
I have no problem with that: if my workplace MITMs traffic, I’ll use my cellphone connection and a personal laptop for sensitive data. If a friend’s house mitms traffic, same deal.
Yes, I agree that is also user-hostile, since it should be configurable. The problem is not about network policies though, since DHCP is explicitly not designed to be a policy and is purposely meant to be optional for the client.
For this reason I wouldn't recommend buying a device like the Chromecast, in which the user can't configure the network settings. Instead maybe consider something like the Amazon Fire Stick which is not as user-hostile.