I've personally witnessed numerous examples of irresponsible airpsace violations including some ******** flying one above 500ft in Class C in approach path for Sydney Airport and many examples of other pelicans flying them above 400ft in Victor 1.
For what it's worth, I know a professional drone pilot who also holds a PPLA and is responsible. He conducts courses along with an instructor who delivers most of the content. Legitimate and professional drone users aren't the ones that we should be worried about.