How effective are solar curtains?

How did my neighbors know when my brother in law was doing drugs inside my house with all the curtains closed?

• my neighbors always knew when my brother in law did drugs at my house weather it was in my garage or inside the house with all the curtains closed. they would tell me they knew he was doing drugs after he left. they would tell me he was snorting crank and coke. how would they know anything when all my curtains were closed and the shades were closed in my garage. did they have cameras inside my house ? could they have video taped right through the curtains ? how did they know what was going on inside my house ? could they have been watching my wife and kids also while they were taking a shower ? why would they tell me they knew what was going on inside my house ? and garage ? I have blinds and curtains on all my windows. how could they see inside my house ? do I need to have the police investigate my neighbors to see if they have some kind of video Equipment ?

• Answer:

  Come on really? Are you this paranoid? They probably did drugs and now when they see him go outside or when he leaves after he is done doing whichever drug, they can tell by how he is acting. There are visible signs people display after they do different drugs. ex. Weed = red eyes, smell, doppy, stumble, arms heavier, excessive laughing Crack = jittery, wired, spacey Shrooms = excessive happiness, extreme attention to detail, huge pupils