While I'm not saying they should have banned one, and not the other it would have been entirely possible to say ban an opioids sales subreddit, but not the bb-gun subreddit. It would have been trivial to simply make the rule such that only illicit sales/transactions were banned. They decided to create these rules and if the rules make reddit look foolish than maybe thats because they are.
Take the challenge from their side. If they leave the bb-gun sub active, how do they ensure that people aren't going to the bb-gun sub, and trading real guns there? They'd have to have humans police each post, or develop ML algorithms that can reliably identify when someone is hiding a real gun sale as a bb-gun sale. The former doesn't scale reliably (sure, the mods of the bb-gun sub could probably do it voluntarily, but I doubt reddit wants to bet the corporation on their continuing to do so), and the latter doesn't yet exist.
Banning both subs definitely stops the illegal transactions at the (relatively minor) cost of not letting people trade bb-guns on their site.
> Banning both subs definitely stops the illegal transactions
Big ol' [citation needed]. This just moves it to r/beaniebabytrades, where you have to not explicitly say you're trading firearms. The only way this helps is by making those subreddits less discoverable, but anyone with an interest in guns will go to another subreddit, and get clued in by the members there.
