Keyless entry was a massive backwards step in car security, shrugged off with "you should have kept it in a Faraday pouch". The responsibility put squarely on the honest law-abiding citizen, not the car manufacturers. I also think the "take your car radio with you" was flawed logic, when that was the thing, in the 90s. Yes, fine if you remember to take it with you, but the one time you don't, it's incredibly easy to steal. Most thieves want a quick and easy job; probably a better compromise is to make it take time to remove, needing a screwdriver and so on.
There's so much flawed logic in prosecuting driving and theft offences. Penalty for driving without a licence? Disqualification. Penalty for driving without insurance? £200 fine, which can be loose change compared to the cost of insurance. Some of these should come with suspended sentences. Yeah, I know, cost, cheaper to do fixed penalties, which barely cover the cost of the admin.
The Highway Code used to say "have the registration number etched on all the windows; this is a cheap and effective deterrent to professional thieves". I'm not sure if that's still the case.
Poor old Richard Whiteley had his Jag stolen when he parked outside the Royal Armouries, he got out, and the thief simply drove it away. Richard thought it was valet parking.