And I know this was one of those things from AE, I personally don't believe there's reason not to include it, as specialized blends of smokables have been around since smoking has. I also feel like it would encourage people to reach out for drugs more often, if we could flavor the ones it would make sense to flavor. It would also help other drug friends to sell their drugs to people who want drugs. Drugs for everyone. I promise only some of them are illegal.
I dunno how much code this would take, but I imagine it's no different then like @cloakdesc, or @smell.
Of course more modern means of flavoring things need not apply, but there's nothing saying Clove is the only flavor that's sweet. Y'know?