I see http://www.facebook.com/help/112010735553116 that each page admin must have their own personal account.
But like Twitter, is it alright for the multiple FB’s accounts to be run off the same ip, which is needed by FB marketers?
It’s very common for people to duplicate IPs when logging into social sites whether it’s a family checking from one ISP or a large office behind a network. I can’t see any reason why that alone would get you flagged.
However if you have shell accounts with no content created to manage things [which is a violation[ you’ll want to be more careful and potentially reach out to facebook on that directly less you get considered a fake / fluff account. There is such a thing as an admin only account although they’re usually only found with larger advertisers.