There are no reasons to believe that hotel rooms are bugged, although it needs mentioning that this has not yet been proven. Safety is not an issue in hotels, but there are some precautions to be taken. If you find a newspaper in the hotel room, please refrain from folding it in such a way that the crease folds across the picture of the president. Also, do not dispose the newspaper or crumble it. Doing so may require a letter of excuse to be written. In addition your guide will receive some disciplinary measures for having failed to guide you. Note that folding a newspaper is a political crime under North Korean law. Residents can and do receive harshest conceivable punishments for these type of crimes. Again, as a tourist there is litle to fear.