Most of the pranks in the show are in good nature and not meant to cause harm. The pranks mainly are focused around embarrassing the contestant and not aimed at destroying anything. With that being said there are some moments where the contestants are told to pour items out or waste food and such; but the producers of the show do go back and pay for what ever is consumed or dumped out.
This show would be appropriate for the 13+ or those who are mature enough to understand the concept of the show and this behavior is not appropriate in everyday life.