success with display?

I have had my driving licence for 22 years. at this time I have been shown 5 times by private: overtake right (I have only observed the right-hand driving bid, no track changed) brake (I did not brake, only light switched on) and still need, traffic danger, insult (it has itched behind the right ear, and with the middle finger I can best get there, what wonder sharpness of sight, at its alleged 100m distance…) in no case have I said: I am not a driver I have always given my view of the things to log. all 5 cases have been set, without further follow for me. now I read here more often: I have displayed it, it should be displayed, it should be displayed, etc. I have never shown anyone, although I would have had reason to do so already x-times. but my time is too bad for it. I curse only briefly and have forgotten it again. I don’t have to be right, I can give in, on my progress (Unfortunately, many people can’t do that: should the tanker tip over the track grooves to the right of the construction site so that I can cross the speed limit on the left.) ask: how often is such an indicator successful?