Yes, ... Mastermason.com did that some years ago and it was again a consideration about a 1 1/2 years ago. It becomes necessary when the Admins and Mods are at odds. This usually cause a split with forum members taking sides with different Admins. Shutting down the forum is a quick way for the Chief Admin or 'Forum owner' to regain full control and realign "supporting Admin"s priorities. ....
Let a group of Admins being to think they can take over a forum and boot the owner off ... reality hits hard when the owner simple walks over and UNPLUGS the server for 30 days.
... but TSS was not a favorite forum of mine, although I am a member ...