Not a good idea at all if you want to keep your accounts in good order (or keep at least one as your "good" account). Google scans and caches the shit out of everything, if you want to maintain two accounts I would keep the domains separate, different credit cards, some people even go as far as using different IPs on the two accounts to avoid being detected. Google is like big brother, they know EVERYTHING. And that's what makes them a pain in the ass to work with even though they have volume.