Yeah that makes sense. I think the problem is it's easy for anyone to go "out of band" with the data with a clone or copy of it that ends up having no link to the digital source it references. In that case you'd need some kind of monitoring or detection to identify these replicas and tag them in some way -- not actually that different from how something like YouTube identifies copyrighted material today. I think a system like this has to be opt-in and part of a community's m.o., otherwise it gets too bureaucratic. The big question for me is whether a community like this (or many) could eclipse what exists today.