Ah, those law abiding thieves will surely stop procuring themselves those devices now that they are illegal.
I frankly don't understand the sentiment. Should we not outlaw murder because "ha, surely criminals won't murder anymore now"?
It's dangerously close to the "thought crime".
In the IT world that would mean going to jail if you have John the Ripper installed.
Car manufacturers have been repeatedly caught with their pants down on the multiple security flaws in keyless ignition systems. These are multi-million dollar businesses choosing not do spend money on recalls or R&D to mitigate this. These corporations are effectively externalizing private costs with public over-reaching legislation and public law enforcement.
Secondly, and much more gravely, the criminalizing with 'unlimited fine', as most laws, will rely on non-technical people's interpretation. In practice this means (as prior history shows with regards to legislation and tech), that the step between banning Bulgarian RF repeater/jammers for key fobs, and charging a 16 year old with a several thousands Pounds fine just for using an SDR dongle becomes something very real.
For anyone with experience past or present in autocratic states it is also an obvious reduction of civil liberties in (what should be) a democratic society.
The equivalent argument would be banning knives so people don't commit murder.
Lock picks at least take some skill, they aren’t super accessible. But an RF repeater seems to be fairly accessible according to how quickly it spread (although most modern fobs stop transmitting when stationary, so these are only effective for people who carry fobs in their pockets all the time).
They make opening a locked doors very easy.
Or regular non ray guns ? They make killing super easy. And you definitly don't need those for most people.
But oil as well, I mean it makes arson so easy and you can burn entire houses with people inside.
Anything that makes the deed "easy" is simply going to make it easier to perform and hence performed more often. It isn't rocket science, and it isn't binary! Yes, you can kill someone with your bare hands, or use an ice pick, or whatever, but not easily, like you could with a gun.
But not guns. They are fine.