That's funny. ..and ok sure, I concede exceptions. In that case, I think (1) the tradition is of hiding from the law has produced quirky horticultural practice

That's funny. ..and ok sure, I concede exceptions. In that case, I think (1) the tradition is of hiding from the law has produced quirky horticultural practices (piping in air and exhaust for plants is normal) (2) they don't really care about unit costs and (3) they're growing a plant that costs $10k per kg! They need security like a jewelry shop.