We are Instructors, not policeman.
Very true. No one is suggesting that you try to make an arrest.
However, there are various channels through which you can (and in some cases must) report illegal and dangerous flying.
I have no doubt that every instructor would report the yob breaking into a car in the club car park so why not apply the same to the yob breaking the law in other ways.
One may find that the first case is simply someone locked out of their own car and in the latter case it may have been perfectly legal but it is the turning one's back on such situations that is the problem.
It is true that instructors and examminers can be just as bad - how many PPL students present themselves at Gatwick for attempt number 4 - not as many as take more than 3 attempts to gain a pass.
Whirly,
There is the MOR scheme and CHIRP to name two methods and then there is also simply a letter to the CAA.
Regards,
DFC