Just my experience from living all over the place, as someone who minds their own and isn't breaking laws, sad but true, when it comes to people coming up to me in a aggressive manner with their hand on a lethal weapon, cops sadly win that survey hands down.
Even in the not so pretty areas of big cities the world around, I've not had a aggressive non police person approach me with much of weapon, much less a firearm.
Plus if a private thug tired to enter my vehicle and steal my stuff, I can defend myself with any means necessary, the initial sign that you're not going to be a victim will scare most off, this was the case on an attempted home invasion that I dealt with a few years back.
If a thug cop decides to enter my vehicle, for no reason, and steal my stuff (see video above I posted, tons more like it on YouTube), I ether have to spread my cheeks and take it, or I can defend myself, but in doing so it'll likley bankrupt me in defending my constitutional rights, and unlike a common criminal they are less likely to be scared off, and it's likley one of us might not go home, and again unlike the private sector thug, you're way more likley to end up having evidence ether show up or disappear when the police are in the wrong.
It's sad when people view a PRIVATE transaction as suspicious, just because the person wants cash, talk about being conditioned.