A window box is outside the window, not inside...and it was a comedy routine, not necessarily based on fact.

There used to be a section in the rules concerning growing in someone elses house without their permission.
There were two reasons...
If your grow is somehow discovered, the owner (or the parents) could be charged and lose not only their freedom, but their home as well. (asset forfeiture)
-or-
If anything goes wrong and you burn the house down...insurance wouldn't cover the losses since you were involved in an illegal activity that caused the incident...

Was also stuff about growing in apartments, but that's gone too.

Curious why these rules were dropped. Have never heard of a cannabis patient needing to hide their grow from their parents.