First, it could be slightly annoying but you can ignore it. Then it becomes louder ..

First, it could be slightly annoying but you can ignore it.

Then it becomes louder and you can still ignore it, but it is becoming more difficult.

Later, it becomes more aggressive and starts encroaching on you and greatly overstepping the boundaries of your generosity and decency.

Lastly, its taking liberties with your dignity and even safety.

With no room left for compromise, definitive corrective action is taken and all anyone else can do is watch.

This is the typical micro/macro story of the european man that wanted to left alone.