It is, but it's still not a good idea. I've seen a lot of drug-related sites that have a clear "no sourcing, no hookups" policy, and it makes perfect sense when you consider that these drugs only stay legal as long as they fly below the radar. Posting direct links to a vendor is usually the one thing a drug-related board doesn't allow people to do, even if all the drugs the vendor stocks are legal (which is often impossible to say, because legality varies so much from place to place). As a user, a hype around your favorite RC is the last thing you want, because that is usually the final step before it turns from RC to schedule 1 drug, or before a vendor goes from being a trusted source to getting busted.

On this site, there's also the added risk that law enforcement may have other reasons to frame users. The war on drugs has always been used to arrest and imprison leftists. Everybody discussing drugs here should be aware of that and decide for themselves how much they want to link their account to one of the easiest ways to lock up dissidents that has a clear historic track record of being used for just that. I'm open on this site with my drug use, but i'm also not American. I don't think i'd discuss drugs as freely if i lived in the US.