Poor form, you should have consulted the memberbase or created a new forums systems instead of cloning.
I say this as someone who hasn't been involved with APB/BHP/AR/Reborn for two or three years now but I do check in every couble of months. It should have been opt-in, not opt out and given I do know the admins here I can trust you have deleted passwords, PMs and other personal information, but if this were some other forums I'd been a member of for 11 years and suddenly everything was effectivly stolen without permission (seemingly, from what information I have gathered), I'd be kicking up a huge fuss.
Not a good first impression, I'd have to say.