Well, I was thinking we could have endless number of (meta) networks / network configurations / standards. I mean each node could have as many tags as needed, e.g. #safe_for_children_v1.1 #pure_web_v2.0. Then you could configure your search engine / browser according to these tags. You could also stack tags to simplify things, e.g. pure_stack would include both #safe_for_children and #pure_web, etc. Maybe I'm missing something, but it seems doable.