So, are you saying that it's ok to lose control of one's self, as long as you're not high?
Anyway, no sale. Someone who gets intoxicated privately does not endanger anybody's health except possibly their own. We have plenty of bad things people do that hurt others, and not enough good guys to catch them. It makes no sense, fiscally or morally, to persecute people for what they might do, or what inanimate objects they own.
Most crimes and traffic fatalities involving drugs, I'll wager, start with someone getting high in their own home. It's the intoxication that impairs his or her judgement.
Legalizing drugs will dramatically increase the number of addicts and the number killed by addicts. How many more people are you willing to sacrifice so losers can have the "right" and "freedom" to get high?