Cars are trivially broken into. Increasing the safety of the locking mechanism would do some good but not prevent. This is what I was referring to by appropriate. Maybe that weakens my argument about at least considering the Flipper as a potentially harmful device, but the Flipper can do a lot of things.
There is a lot of security that relies on things simply being inconvenient.
Remember how in the mid-00s it was pretty trivial for any nerd with a Linux laptop to sniff traffic on a WiFi network and intercept passwords? For years the security-aware community was making a point of this, but major web sites just kept using unencrypted HTTP for their logins and such.
Then someone released a Firefox extension which made it literally point and click for almost anyone on any OS to capture and reuse passwords over the air. Suddenly it went from trivial for nerds with the right tools and a bit of training to trivial for anyone who wants to try, and very soon after that we started seeing the "HTTPS Everywhere" movement explode in popularity, sites like Facebook locking down at least their login endpoints if not the entire site to only work over HTTPS, etc.
Insecure communication was always a problem, but it took the combination of popularity of WiFi and point-and-click tools to make the world care enough for the problems to get solved. Until that happened, those with the ability to solve it didn't care enough because it didn't impact their bottom line because not enough of their customers cared.
Good, this will hopefully lead to less of that.
edit: Like Firesheep, as my sibling comment pointed out.