If you do not write your name on the envelope, and the receiver doesn't rat on you, which would be impossible for him if he doesn't know your real name, then there shouldn't be a risk at all. It's not like customs will take dna samples from the envelope. The only one at risk would probably be the receiver, but if it's sent as a 'gift', he could just claim it's a gift, and he didn't know anything about it.

Nobody would be hurt, nobody could be charged.

Worst case scenario, the merchandise is simply confiscated.