When one idiot makes graffiti at Charles' bridge, it is big offense, but it offers great chance for powerful men to fight among each other for this task to remove it while getting a lot of money for themselves. And while their battle for this started, something unthinkable happened. After ten days the graffiti disappeared!
While the punk, who made it was bad, this one was looked for by police, for he could damage the bridge. This Vigilante turned himself in after few days and shocked money hungry men big time.
He was professional restorer with vast knowledge about working with stone and buildings. He showed the police and media how he removed the graffiti, using warm water. He pointed out that if it remained there longer, it would get into he stone and would be much harder to remove. Because of gentle method used there can be no charge raised against him.
The bridge is clean, it cost nothing in the end, (and the cost would be low of it was paid anyway) and the money-thirsting politicians got nothing, cannot take any revenge on the guy and they look incompetent and stupid. Of course they wished no comment on the matter.