Are my parents marijuana growers?

well, i started noticing a trend in all the houses we ever had. They all have places that i can't reach without leaving SOME kind of evidence i was there. well, i saw a picture on my dad's phone, looking like it was one of those "legalize it" pictures from the internet, and also, when i was watching a CNBC special on marijuana, he kept piping in with all these facts about marijuana. also i'm being DEAD SERIOUS