Good advice for all aspects of the hobby. I don't think the problem lies in the use of these devices by existing modelers. The risk is the non-modeler making an impulse buy then operating in a careless manner. He or she will never become aware of these risks until after an incident occurs. Then our elected representatives will enact broad, sweeping restrictions on all non-man carrying devices that fly that will impede or even eliminate our existing hobby.
Personally, I wish the devices had never been invented, but the milk has already been spilled.