Perhaps the people taking drugs into foreign countries where they will be arrested, consume either no news or only what the propaganda media puts out. They may come from a state where marijuana is now legal and think it is legal around the world.
If stupid means uninformed, they are definitely stupid. If stupid means low IQ, not necessarily.
I think they should serve a few weeks in a US prison or something like that — based on this stupidity.
The full release should be saved for actual miscarriages of justice or someone caught up in something bad with no other remedy.