grim, same thing happened in a place about 20 minutes away from me yesterday, found 800 plants in a house thatd been purely designed for growing lol, they'd knocked out ceilings and walls to fit them all in supposdely..
fucking scum! although really, the grower/s should of taken more precautions, you could smell the green half way across the road, damn if youve got 800 plants you can afford a ozone generator or carbon filter, or both x10, dont forget that growers..