I did lock my scooter, didn't I?

Somebody looked his scooter with a big and heavy lock. But....what a shame, he locked it wrong. He was putting the lock through the front wheel and around the metal bridge. In other places this would be fine, but not in Amsterdam. When they see this bad locked scooter, they just unscrew the front wheel and take the scooter with. Sameway they do with bicycles...So please use two locks. If you only lock your back wheel, they will steel your front wheel...Very sad.