Things You should not let Sheldon Do
Do not let him near any sci-fie or comic book Icons it will result in a restraining order.
Do not let Sheldon upload his mind into a computer, it will most likely result in something like the Borg only more annoying.
Do not let him near Will Wheaton a fight will inevitably occur.
Do not let him near your GPS, Notebook or other electronics he will Sheldonize them.
Do not let him plan a double date, chances are he will pick something not even Amy would find romantic.
Do not let him help with your business Ideas ten to one he will do something that will drive you crazy or get you arrested.
Sheldon is not allowed to pick team names it will come out as something inappropriate or he will not see the Irony (Example: Westly Crushers).