I am glad we all had opportunity to trash this matter out. But as it stands, IMO, the latest decision by the admin will not eliminate the problems that have arisen due to spurious registration and abuse of multiple nicks.
Permit me to table a suggestion, Darren:
1. Disallow any one person to have more than one identity. Make this a blanket policy as you had originally stated.
Since in the admins' experience, 99% of the time, people who tend to have more than one tend to use it in nasty ways. This will take care of 99% of the problems caused by multiple userid troublemakers.
2. For those 1% of the people who somehow fear ridicule for whatever reason, etc, who need to take on a different persona in order to trade on Buy-Sell, let them apply to you for special permission to do so. Put them on a 'special list'.
3. To protect the best interest of a large number of folks (I would guess a LOT of people are probably so inclined) who want to know that the people that they are trading with are people that they are comfortable trading with, based on their other online experiences with them, this 'special list' should be made available to all who wish to look at the list. Surely we have the right to assure that our transactions are with people we don't mind transacting with.
We should be so thankful that the admin is a considerate and kind person. That he's been willing to mollycoddle a decidedly dodgy individual who cannot bring himself to admit that he actual needs more than one nick

to run his business here in CS, speaks volumes for his being a really nice guy.
I suggest people spare a thought for Darren, of the annoyances and difficulties of administrating a forum when one doesn't do it full time for a living.
(Personally,
if it were me, I'll just implement the one-nick rule and be done with because I'd have a fulltime job, and I am just operating the forum a labour of love for the hobby and the people who share my passion. I wouldn't have the time to be so bothered with generally petty needs. It will come down to: "I am sorry, but because of limitations with human and other resources, these are the rules that will benefit most of the people but they may not cater to your extremely unique personal requirements. We can't please everyone, but I wish you well in finding another forum that will. Fare thee well."

Pardon me,for thinking out loud)