diberry - 5:46 am on Dec 2, 2012 (gmt 0)

I've talked to people who habitually keep all their domains very separate. Different hosts, privacy for the domain owner info, no interlinking, no common accounts for stats or ads, no affiliate links that can be traced back to the same account, etc. Be definition, a scheme like this should work, it's just how do you know for sure you covered every base?