Originally Posted by
Ditto
I don't quite see how those regulations (which I have never seen enforced) hinder such a thing, nothing prevents me from moving stuff from my carry-on luggage to my checked baggage (and v.v) before leaving customs,
And how do you access your checked baggage when you're transiting? Either you have it checked thru and you will only be able to access it at your final destination, at which point you will (at least theoretically) already have paid due duties on the items in your carry-on or you'll have to recheck your bags during transit, which means that you have to carry all your things thru customs and check them in (in turn you get labels with green stripes).
Originally Posted by
Ditto
There is also nothing preventing you from handing over goods to other passengers before entering Schengen (instead of before heading out of customs in your destinations), and actually there is nothing illegal in that.
And how that person has to go thru customs too. So you won't be able to avoid customs. If however they let you thru with your carry-on without checking, you could swap carry-on with an passenger traveling within Schengen, who could upon arrival pass customs without being checked (thanks in parts to the two green stripes on the luggage label).