The problem with blocking all google doains is the amount of sites it would break. Youtube, gmail, googleapis for js libraries, google's blog platform, maps based on google maps and more would break.
Technically true, but blocking all Facebook domains breaks comments on many sites and the login feature on a few crucial ones too.
<sarcasm>It also 100% breaks your social life, but maybe there's little of that left to disrupt anyway, amongst the typical target audience for these lists :P</sarcasm>
It's actually the other way around. Normal people have managed their social lives without facebook for generations. It's only the recent crop or two who seem unable to do it.
No, "Normal people" who care about their social lives use whatever their friends use to get together at the time. Nowadays this is social networking sites, i.e. Facebook.
<sarcasm>It also 100% breaks your social life, but maybe there's little of that left to disrupt anyway, amongst the typical target audience for these lists :P</sarcasm>