Is it dangerous?
The propellers of a drone rotate at high speed. For a small drone (the ones we deal with in this part), there are not too many worries. At worst, there is a risk of entanglement in the hair, or
some benign marks on the skin.
On the other hand, when you use more powerful drones (brushless motors), you do not laugh anymore. Search Google for "drones wounds", and there you will see that we do not joke anymore. It can cause very serious injuries. Consider this drone as a flying lawn mower. There are very specific safety rules to be respected, rules that we will discuss later. For now, enjoy your little drone without constraint (be careful however to the eyes ....)