It makes no suprise that these things are happening...unfortunately the world has people that think its easier to thieve then it is to earn. In no way do I condone this behaviour and I hope the offenders are caught and dealt with.
But in todays world, if you leave a rodtube (with rods in it) on your car roofracks then you are (once again, unfortunately) asking for it to go missing. Lock up your goods and dont tempt fate.