If you moderate any comments or information in your community, you are a publisher of information. Publishers have responsibilities.
Despite your terms and conditions, if information in your community harms members, you can be held responsible. If the actions of the community harms your client (or rival companies!), you can be held accountible.
Today is a good day to a) protect yourself and b) spend a few hours with a notepad brushing up on legal issues facing your online community.
And if you’re self-employed building communities for clients, then you should buy professional indemnity insurance right now.