>>>> my pranks are nondestructive and harmless except

>>> Except when you get involved in an excalation which eventually causes
>>> you
>>> or your antagonist to do something which causes unanticipated damage.

>>> Even if you personally are not the perpetrator of the ensuing
>>> accident, you
>>> are a contributor to the acceptance of this sort of behaviour.

>>> The workplace is dangerous enough without horseplay.

>> A frog in a box with "DO NOT OPEN" printed on it will escalate into what?

> An empty box with something that smells like chicken frying in an
> electrical panel and sending current to a remote location where
> something smells like pork.