I predict in about ten years things will go the other way - they will raid you because they suspect you of participating in cryptographic non-governmental currencies, and if they just find some grow lights and plants you will be fine. It seems like that is the direction of things.
Now that many high quality grow lights sport LED bulbs and do not consume nearly as much power or put out a lot of heat, how will the gestapo decide who to raid? I guess they can always knock randomly and claim they hear a noise on the other side of the door...
They can try and work out who purchased multiple top-end graphic cards. Maybe raid Amazon for a customer delivery list or ATI for a warranty registration database.