wait, so you can kill a website JUST by deleting it off the server? WHERE IS THE SECURITY IN THAT?
It's called don't give out the user information that allows the person with the proper permissions to delete the database or do dumb things like that *cough*JimMorrison*cough*.
Or do something like give (In linux lingo) rwx permissions to the uninstall scripts and programs to a person like Octopor (it classifies him as other).
Or if this was installed by an SQL script, then remove all the code that re-creates the tables and run the program. If its a proper install script, there should be DELETE * FROM xxxxx lines on the start of the script.
Hell, once Eric gave me access to the database for this site and I wasn't even admin back then. He was lucky I didn't do something stupid back then.