i.e.: Ask yourself why you want to block all Google hosts and open your mind to a new solution to that same problem. One that while less evident may well be more feasible.
I'm increasingly trying to find reasons not to block. Their G+ tracker icons and toolbar are now all over the place (even saw the toolbar on Liveleak, of all places, at one point). They've extended their Real Name harassment to anyone who logs on to GMail. (They've done it only once for me, for now, as opposed to the every-reload rain of creepy that sent me flying from YouTube, but a day or so before that incident I also had to unblock plus.google.com to even log in. My account was apparently not "upgraded" by that, but still...at least buy me dinner first.)
"Pile of shit"? Not quite, but they're aiming for it and have already reached "damage to the internet".