Wow bro, I would have been freaked out as well damn. Note to self ask who is at the door before opening...I remember a few years ago when I was trimming an OG Kush I answered the door to the pork chop patrol, was expecting a friend else I would have never opened the door, I even had sugar trim stuck to my T shirt lol. All the old bill wanted was to tell me a neighbour had her tyres let down and if I saw anything. It was enough for me to kill all the plants I had going and dismantle my grow rooms lol luckily he didn't take it further as I have no doubt he would have smelled the weed.
Got me all paranoid and shit, better now that I know it was the feckers upstairs. back in full swing!