Never ever EVER PERIOD!!!
They (major parcel shipping companies) are required by federal law to have screening machines to find packages like this.
Since 9/11 all shipping companied (Especially DHL) have upgraded and spent billions of dollars upgrading their security and detection eqiupment.
The old tricks no longer work for shipping cannabis, we have to improvise new ones.
I heard stories when I was in NZ from a DHL employee about how smugglers are now stuffing the metal tubing in furniture with cannabis, sealed and washed. Inside METAL and they STILL found it.
Scary stuff....
Yet I managed to get 12 seeds through 2 customs in 2 countries.
Lucky me.