Again does your argument not apply to any good purchased overseas.
If someone travels within their limits with DF Alcohol, how is it anymore of a waste of fuel compared to someone traveling within the limits with no DF alcohol?
The security and weight arguments are not sound sorry.
Yes my argument applies to anything being carried unnecessarily in either direction. By all means purchase souvenirs or bring back that unique liqueur, but do we really need to travel with "stuff" to fill our carry on and checked baggage limits? If we only took with us what is really necessary then baggage checks in airport security would be quicker and overhead lockers not as heavy.