I don't know, should we? Over here, potassium permanganate became a regulated substance only about 10 years ago so I wouldn't be surprised if in 10 more years, sodium hypochlorite too stops being sold over the counter.

Now, lest this comment of mine becomes too upvoted, here is another controversial take to counterbalance it: some things can be used almost exclusively only to kill people, like guns, unlike knives. Yes, you can stab or cut someone with a knife, but you can stab or cut many other things than humans for useful and helpful effects while the gun allows you too... put small, deep holes into things from a distance, with not-so-great accuracy? At the very best, you can sit in an arm-chair with your hair-trigger and a hundred Boxer cartridges, and proceed to adorn the opposite wall with a patriotic V.R. done in bullet-pocks, but I feel strongly that neither the atmosphere nor the appearance of your room would be improved by it.