I call this a pre-crime arrest.

He warned of the ‘devastating consequences’ on his ‘lucky life’ if he carries a knife again. ‘One of my nightmares is that I give a lenient sentence to someone for having a bladed article and read a few months later that they have stabbed someone,’ said the judge.

‘You are just another young man carrying a knife and that makes you very frightening to people in west London and that is why people think I should send you to prison.’ Prosecutor James O’Connell said Ferry was rude when police in west London stopped his uninsured Saab car in September.

via Bryan Ferry’s son Merlin: A knife? That’s not a real crime | Metro News.