I think in this day and age without the help of older generations to show us how to eat and exercise, the internet has become a fantastic resource for everyone. I spent three years in a very high and concentrated state of research on the net, every day - because I wanted to find out what the hell was wrong with me. That included forums and chat sites as well as more info based sites.
For me, paleo was a godsend. I knew it was 'right' - it rang true and I got results. After that my internet searching stopped completely (unless I have a very specific problem - well, then I come here). Paleo brought me not just a blueprint for eating, but I also got very interested in the hunter and gatherer lifestyle, which took me automatically outside into the woods, primarily to learn about wild food again and teach my kids about it too. I spent more time sourcing local produce and going to markets instead of dashing round the supermarket and more time preparing broths and bones and odd cuts of meat and organs. I spend more time in the vegetable patch.
So, what I would say is that, yes, I found computers and the internet a part of life, community and a great resource for ideas.....but when I became 100% convinced that what I had found i.e. paleo was right, the need to research and gain more and more info kind of dropped away. When you can trust what you are doing is totally hitting the mark, it becomes more a case of going out there and doing it, more a case of a 'complete lifestyle choice' and this I found, does not actually have much to do with computers.....
....I think that all the things you mention ARE probably getting screwed up! After all, computers are such a recent development in the history of mankind, who knows what real effects they are having on us. I feel so terribly sad for all the parents dealing with children who are addicted to gaming now. That is why Paleo is so fantastic for giving you a reason to get out there and live your life away from the computer.
Have fun!!! p.s. if you do continue to use computers you may find f.lux helpful - it removes blue light from the computer screen at night, helping you get back into your circadian rhythms again.