Are the Government not missing out on an opportunity to solve a problem?

If someone is driving a car which isn't insured the Police can seize and possibly crush it if insurance isn't forthcoming. If the Police catch someone using a mobile phone in their hand or texting, they should have the authority to seize the phone and immediately crush it. I am sure there are very few who would risk this penalty twice. It would be more effective than a paltry £100 fine.