The retro idea of curation seems popular here but everybody forgets why it lost out in the first place. It just doesn't scale in the first place. Not to mention

The retro idea of curation seems popular here but everybody forgets why it lost out in the first place. It just doesn't scale in the first place. Not to mention demands - people usually want tools which lower mental effort and are intuitive as opposed to ones which are precise but in an obtuse metric. Most would not find a hardware mouse that consisted of two keypads for X and Y coordinates and a left click and right click button very useful. Similarly everyone maintaining your their own index is cumbersome overkill in redundancy, processing power, and human effort in return for a stunted network graph which is worse for all metrics people usually actually care about. In terms of catching on even "antipattern search engines" that attempt to create an ideological echo chamber would probably catch on better. Short of search engine experiments/start up attempts the only other useful application I can see is "rude web-spidering" which deliberately disrespects all requests to not index pages left publicly accessible as search engines generally try not to be good tools for cracker wardriving for PR and liability reasons. It would be a good whitehat or greyhat tool as doors secured by politeness only are not secure.