I'm not very security minded. I have old domains and subdomains that I used to use that have long since passed - that lived on server IP's that have also long

I'm not very security minded. I have old domains and subdomains that I used to use that have long since passed - that lived on server IP's that have also long since passed on from my ownership as well. I just double checked all of my old stuff - and there's not a trace left out there. Apparently, I cleaned up all my old DNS entries as things moved on, even though none of those domains are my 'brand' (as the author states it is his). As a non-security minded person, I find it hard to believe a security-minded person, whose good at his trade, forgets to do this.