Are there any rules for accounts being used as clubs or 'group' accounts?

Currently deviantART supports no Club or Group system. Deviants may choose to use standard accounts in an improvised fashion to create 'clubs'.

Be aware that such improvised clubs will have no official support and will not have specialized tools or policies created for their benefit. The deviantART administration will not support or enforce the private rules that these improvised 'clubs' choose to implement among themselves and the staff will not intervene in the manner in which users are included or excluded from the 'membership.

All improvised club accounts will be held responsible for the contents of their own galleries regardless of how the material was acquired which may result in the improvised 'club' receiving a ban or suspension due to content provided by other people.

Improvised 'clubs' will also be held entirely responsible for the behavior demonstrated by the account. If multiple users have access to the account the inappropriate actions of one user can and will result in the ban or suspension of the account regardless of how many users actually have access or how many "members" they count.

Accounts pressed into service as improvised clubs will be treated by staff at all times exactly the same as single user accounts without regard to the specialized, unintended purpose for which the account is used.