The FAA created SEPARATE guidelines for sUAS's. Hobby fliers have different guidelines from commercial fliers. See post above. Recreational fliers are strongly discouraged from flying in restricted airspace as endangering NAS is a big no-no and you can (and likely will) be held accountable. Above 400 AGL is not restricted airspace for recreational fliers, if that is what you are referring to. If you wouldn't mind posting FAA regulations to the contrary, I would love to see it. I state these facts to help eliminate incorrect information, especially from posters trying to "police" others for their own enjoyment, particularly with those that make up rules to help make their case. I happen to believe that safety comes first, and flying with complete understanding of your surroundings and the airspace you occupy is paramount. Reckless flying is absolutely intolerable and should be pointed out when needed, hammered home if required. But with factual information.
Andy, if you don't already know, there is Public Law referencing all this information, and there is FAA interpretation of that law. From that, FAA guidelines have been established. Since this is all fairly new, many people are confused between the two groups of sUAS pilots. Understandably so. But the distinction is real, and recognized by the FAA.