Sorry, the Mavic IS toy-grade. Ok, ok, those semantic can be inflammatory to people who feel $1000 is a lot to spend on something and guarantees a level of professional quality. It can seem unfair when they have WAY cheaper toys that they associate with target.
Let's rephrase it. When flying non industrial grade aircraft over groups of people and property, without professional training (not to mention official clearance), it is irresponsible.
There's a reason industrial grade aircraft cost a ton of money. The mavic is a great piece of engineering. But I can't help but think that many people who are endangering people are very well meaning people who simply do not understand what they are and what they are not controlling.
Read these forums for a day and you will see two problems:
Problem 1: Drone hardware or software that is not industrial grade. There are some good "redundancies" built into the app, but they would never meet aviation standards. Buggy software, obstacle avoidance sensor problems, signal drop outs, unexplained flyaways, etc. They are relatively rare, and perfectly acceptable for a consumer grade craft. But this would NEVER be acceptable by industrial grade or military grade applications. And that's FINE - until you treat it and apply it industrial or military grade flights and applications.
Problem 2: Pilots who have not gone through 100s of hours of in-flight and in-book training, testing, and certification. By the way, I am one of them, and I don't think it's necessary to have a great time and be a decent pilot with the Mavic. But as soon as you convert that into "therefore I am fine to fly over a busy city street at 200 feet in the air" you are sorely mistaking and taking gambles with other people's lives. You know that dropping a penny off a building can literally kill someone due to the velocity, right? I dread the day the sadly inevitable news story comes out where a drone pilot crashes over a city and severely wounds or kills someone.
The post isn't meant to insult everyone. Realize the tool you are working with, be honest w/your experience level, recognize the heart behind certain laws, and most of all - the gravity of a potential mistake.