If we continue 'leaving it' to the police, nothing will get done about (a) bike theft and (b) dangerous/illegal driving and parking.
I'm glad people like Mikey are on the case, as the police are useless.
Where I live we have huge problems caused by drivers parking on pavements (which is supposed to be illegal here now) and double-parking on busy roads rather than bothering to go a few metres further along from the shops where there's space by the kerb.
This makes it harder for pedestrians to navigate the world safely, especially those with pushchairs and walking aids, blind people, children, the elderly etc. It's (in my experience) mostly relatively young, able-bodied (lazy and inconsiderate) drivers who park like this. And just this evening, there was a police car parked on the pavement along from my house (literally 2 metres from an empty off-road parking space).
The police do very little to prevent bike theft, or tackle the sale of stolen bikes by thieves. Even when they recover stolen bikes, they don't go to much effort to return them to the original owners.
Personally, I believe that all drivers (especially those who will be driving in relation to their work, or having any kind of road safety role, like the police) should have to attend basic cycle training in order to get a driving licence. This would mean that this training would end up becoming compulsary for the vast majority of adult cyclists (most of whom have a driving licence); at the moment it isn't.
It would lead to all road users having a better understanding of each other's behaviour/choices, as well as a bit more empathy for each other (there's plenty of evidence to prove these impacts).