I'm the other end, completely agree with the OP.
Family time is useful and needed, and I'm glad in hindsight that I had it!
Technology is great yes, kids communicate via fb, msn etc, but this shouldn't be relied on!
Have I ever got through an interview using the internet or facebook?
No, because I actually have some social skills due to the internet not always being in use!
There is an overwhelming reliance on facebook and other social networking sites nowadays, and it's degrading some of our social skills sets.
Let them facebook or chat, but go ahead with limiting.
I was never allowed the tv on ALL evening, and had a certain amount of credit per month on my phone.
The advent of facebook/twitter/msn has meant that the idea of limits is eroding. When my credit was done I was done, no getting more, I knew the limit and made it last.
With facebook having no limit, it needs to be enforced somewhere!
I have seen the progression though, with me it was "can I please read my book for longer before the light gets turned out", with my sister (3 years younger) "can I please stay up and watch the tv please", with my brother (13 years younger) "can I please go on the computer/internet for longer".