[SWAMPSNIPER]

I think they even have "amnesty drops", where you can discard contraband with no questions asked. This is the warning on the Singapore website;
WARNING:

DEATH FOR DRUG TRAFFICKERS UNDER SINGAPORE LAW

It doesn't seem vague to me!

[DTogo]

They certainly make every attempt to warn people and allow them to get rid of their stuff.

Of course the baggage claim area is just before customs, too, so any "stash" in the checked baggage could be dumped.