[pikma]

I absolutely want to do something like this to help me and my family spend less time watching our phones in the evening.

Does anybody know of a reasonably-simple way of either increasing the latency or throttling the bandwidth, per-device, with programmable hours? For example, is there any wifi router that lets you do this?

[lstodd]

You'll only get frustration and lashing-out as a result. This is a wrong approach.

Get some activities for that evening organized first.