The Rule of Funny states that in a work of comedy, anything is possible as long as it's good for a laugh. This is one of the governing principles of writing PPC missions, since one of our stated goals is to be entertaining. Since this rule often results in terrible things happening to PPC agents, it is one of the Laws of Narrative Comedy.
If you're writing a mission and you're not sure whether or not you should do something, the first question to ask yourself should be, "is it funny?" If the answer is "yes", you can probably get away with it as long as it doesn't directly break established PPC canon or squick everyone out. If the answer is "no", you may wish to avoid it. If you're still not sure, consult the Board.