robzilla - 12:31 am on Apr 8, 2009 (gmt 0)
If you change content and Whois and DNS - then Google very well may "reset" the domain to zero and give it a total fresh start.
It seems to me like that might result in too much collateral damage, if automated. After all, why "reset" a domain when the new owner simply puts up a legitimate new version of the website. Same topic, same (or similar) content, but a new owner and a different site hosted on another server --- seems legitimate to me, and no reason for such a heavy "penalty," one that would practically render the domain worthless. I do think alarm bells might go off when all of these things (DNS, whois, content) change at the same time, but it would be more reasonable to either queue it for a manual review or, if the process is automated, determine the relevance of the new site.