We only have to follow those laws because they exist.
Laws aren't some sacrosanct that have always been. They can be changed. And some need to be changed.
Who cares what I do in my own home as long as it's not hurting anyone else? (And if anyone else in the house is fine with it; e.g. smoking.)
As one of my philosophy professors put it, "It's nobody's business if I want to ride around my living room on a Harley, with a fifth of Jack in one hand, a kilo of blow in the other, blasting death metal if it's not hurting anyone else and it makes me happy."
Besides, gotta get passed the 4th amendment before coming into my home. As one of my English teachers said, jokingly, "It ain't illegal if you don't get caught

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