For the record I'm not a fan of this sort of censorship either.

But I'm guessing their aversion to drug references is more to avoid offending people than to discourage drug use: opiate (and amphetamine) abuse is a pretty serious problem around the world, and a lot of people have lost family or years of their own lives to addiction. Naming an app after something with so much destructive potential---and as a marketing gimmick, no less---might seem a bit insensitive to some of these people.

Again, I'm not saying I agree with this logic, but it's a perspective to be mindful of.

You're not guaranteed free speech by private corps, they're not a government after all.

I don't have a problem with any of those names but it's their policy which developers agree to before publishing apps.