Hard sided, locked suitcases seem to be the way to go too. I've heard stories just recently of seeing slashed soft side luggage coming out of the carousel at the airports in some small cities, especially in Russia. It seems the smaller the city, the more likely that theft is a significant portion of their income. If you make it easy for them, they WILL take advantage of it.
My wife learned during her trip to Russia, that gifts (toiletries, perfume, etc...) help to insure that your personal items won't be stolen from your hotel room while you're out. Even so, keep everything locked (in your hard side luggage) when you go out for the day.
"I still play with a full deck, I just shuffle slower"