Many valid points. Although the Black-White Hat SEO would always be a never-ending argument, it is true that there are basic techniques (such as scraping) which will always be Black Hat, no matter which side you ask.
One thing, however, each and every one of us is guilty of trying to modify the SEs for the sole purpose of their own well ranking.
Our relation with the search engines (as an industry) Dom will never be good. Nor will they ever agree on anything, since they make no money from us – the gambling advertising is “outlawed” by them. Also, Google as always been proud from the fact that their results are 100% machine generated.
My personal opinion is that these techniques will be cought by the SEs in a near future (except Yahoo). We should definitelly wait, as Google mentioned that they will be tweaking the results all summer long, and I hope this will result in cutting the Blac Hat techniques to a minimum.
As of a tool which could take sites of the search engines – first is very, very illegal. Second, if such a tool existed – it would definitelly be misused.