I am one of the few people I have heard of who have been stopped and had their cases searched at Dalaman. I was the only one flying transit via Istanbul (so as things turned out absolutely everyone else on my flight was on a domestic IST - DLM flight). At Dalaman they would split transit and domestic passengers and yes I was the only travelling person in international arrivals that night.
I was returning from an exhibition with a case brimming with treasures - ham, cheese, bacon, sausages etc. Obviously the customs guy was bored rigid so decided to come and see what my story was.
Even worse, my tasty treats were packed around a DVD/VHS combo (another story) I had bought in the UK. He searched the case, moving clothes to reveal huge catering packs of bacon. He moved bacon to reveal a DVD player, all shiny new. He looked up at me with a very stern expression indeed. "You...teacher in Turkey?", I said no, I'm not a teacher. "Yes, you teacher".
Then he gestured me to put everything back in the suitcase and walked off.