Except shipping via UPS and FedEx isn't illegal. It's a violation of their policies, but it is not a crime. Shipping via USPS is a crime, hence the stern warnings, both here and in ever competition (at least every single one I've entered) of DO NOT DO IT.
I'm sure a mod could clarify this better, but I'm pretty sure as long as marijuana and distillation are illegal in Texas where I believe this site's servers are located, I'm pretty sure that the topics remain off limits, regardless of whatever another state does.
Apples to oranges.
See above, USPS is a crime. Where the private couriers may refuse or return your package and that's it (ie a minor inconvenience), if you ship via USPS you can have federal agents knock on your door, you find yourself in court, and in prison or with massive fines, or both. Not worth the risk.