I have never known of a case where a cop just showed up at someone's door. I haven't found any cases where someone has been raided for growing for personal use only. As in none of it ever leaves the house. If anyone else has tried to find the likelihood of various things happening under various circumstances, I would like to know about it. As far as I can tell, growing at home for one's own use and no one else's is pretty safe. A good database of who gets busted for what would be helpful to everyone. I hear about a lot of grow for profits out of the house that get raided.