Then there is this story about people using a high pitched siren to chase teenagers away (the sound is pitched at high enough frequencies that only the young can hear it). Again, I'm a curmudgeon, but even I see no reason to chase these kids away, unless they are really doing something wrong.
So what's in common that made me think of these as linked in some way? Well I couldn't help but think of this
I see no hope for the future of our people if they are dependent on frivolous youth of today, for certainly all youth are reckless beyond words... When I was young, we were taught to be discreet and respectful of elders, but the present youth are exceedingly wise [disrespectful] and impatient of restraint"That's attributed to Hesiod in the 8th century BC.
The more things change, the more they stay the same.