My concern with an "AdBlock Easylist" style centralized block list is that it removes, or at least blurs the consensus feedback to Google of what is a content f

My concern with an "AdBlock Easylist" style centralized block list is that it removes, or at least blurs the consensus feedback to Google of what is a content farm, what is a low-quality non-farm site, and what is useful. A user above listed about.com as something they wanted to block, while I find them to be not very in depth, I wouldn't classify it as useless, and certainly not a content farm like livestrong.com.