And even in the countries they are illegal in, it's not like the authorities are going to even bother arresting people who order them. Cannabis seeds are also so easy to conceal that it is very unlikely that they get noticed during transit at all. Only thing you may wanna do is order to a different address than the one you grow in, just to make sure that even if the shipment is intercepted, they can't track the grow site just by it alone. Some seed vendors make this a bit difficult by only shipping to the billing address of the credit card, but that's life.