How to Disassociate websites, to keep a Google Penalty on one from affecting all

My firm has a large collection of websites. We also have a highly-effective (at least for now) black hat SEO technique. We have never been slapped or received any warning messages from Google. Our method does not work via link building or involve content, though we will be optimizing the on-page content and architecture on it's own.

While Google appears oblivious to our method of "SEO" (It's not really SEO as traditionally understood, but results in the same effect - first page ranking), it is quite likely they shall "notice" us in the future, especially if we trip some sort of warning by ranking too well, too quickly. In order to avoid catastrophe (Google flagging one of our sites then subjecting all other sites to the same level of scrutiny), we have instituted a number of pre-preemptive actions to "disassociate" our websites. I am willing to post what we have done here, but would first like to hear from other BHW members what they have done along similar lines. My goal in posting here is to uncover any important precautions that we might have missed.

Specific technical concerns:
1) How to best attempt to detect any flagging/penalization/undue-attention by Google or Bing
2) How to individually disassociate a collection of sites, so as to avoid the flagging of any one site causing negative repercussions to spill over onto other sites owned/worked on.

Looking forward to actionable comments or links to other related posts or resources.

1) No clue. Most people just see a drop in SERP's, or have a google account associated with their "one" (oh jeez..) site and get a message informing them that they fucked up and to figure out where by themselves.

I'd presume you took precautions not to leave obvious foot prints (registrar info being visible and the same, same hosting\IP's, same contact information on pages, etc.).

2) If you're inter-linking them, that'd be an obvious primary worry. I'd have a .htaccess file on hand that you could upload to the hosts in times of desperation if you get the first ingcling that any of your SERP's have dropped due to penalization (or worse de-indexing). Having it forbid each of your domains from referring, this would block all requests from your collection of sites to one another in need of desperation, and not rely on Google identifying itself as googlebot if it were to verify instead of just crawl for indexing.


Interested in seeing other's opinions and experiences. I haven't been penalized before, so I can't speak from experience, just paranoia.

Basic de-association precautions include anonymous registries, different hosting IPs (several on different hosting accounts, several on the same), no cross-linking, no shared contact info or other content, separate GA/GWT codes and GA/GWT logins. Concerns include IP tracking of GA logins, association via shared CMS interface or manual reporting by competitors. Perhaps I will try calling some hosting professionals. Any other ideas?

Most effective way would be to use GWM Disavow Tool to "disconnect" the link between your websites.