Check the thread
here for more on the issue of search engine indexing and on escaping it.
About the Rssing outfit that you pointed to, that's an unsanctioned archiving (if we're to call it that), or trawling of Eratosphere from some unknown group or company. It comes across to me more as a spam/scam outfit. But if it's Rss as their site name seem to indicate, then it should be essentially a rolling feed from their web bots of the latest material from Eratosphere, and the several other sites they're scraping, through, which it doesn't always appear to be. Anyhow, I've bothered doing anything about this in the past since it seems to be of minimal impact to the Sphere, and taking action might actually produce more grief than reward.
Rssing--and there may others like it--is, for want of a better word, an Internet-leech website that sucks out the contents of other legitimate websites and republishes it on their scam website for the purpose of slapping ads on the content and generating revenue, which the originating websites don't get a sniff of. I've seen multiple reports from some of the websites they've been victimizing expressing their frustration in achieving little to no success in their attempts to get them to cease and desist. And there also seem to be an extensive list of copyright violation reports filed against them with Google. And, alas, Google doesn't seem to be doing enough to deter them!
Cheers,
...Alex