The added risk of having to get out of the vehicle physically would make the entire thing worth it. But we're literally talking about hopping out of a vehicle scoll and click on ATM then get back in and leave. It's not like you would need to sit there through a loading bar. With a vehicle placed properly, even with someone approaching, there's a high chance of escaping. The vehicles location wouldn't be disclosed and they would be as frequent as regular DP missions and the destination would be random. No one attacking would have knowledge of their route and would have to act fast when the truck quickly approaches a stop. Any successful camping would need some above-average coordination. A LARGE chunk of these would go by unnoticed, unless they are spotted randomly in route. Which, in all honesty, is no more risky than driving a HEMMT basically anywhere outside of town. The driver dies, the vehicle and gear despawn and the rest is up to the rebels to complete their mission.
There's no risk to the drivers, only reward after fighting off whoever is chasing them. It doesn't cost anything and the loadout is temporary, so there's no concern of losing it. If a group of rebels are successful enough to actually get the bonds, they still have to make it back to the rebel outpost, where, if APD treats it as something closer to a post Fed pursuit, being notified by the "Armed Transport Dept." it would get the APD active in a small side event and give even more of a fight for the rebels.
If an armed vehicle is attacked, cops are called and the driver and passenger defend it until authorities arrive. Which wouldn't be all that hard is something like a Hunter. Allowing drivers to stall a bit, until officers arrive wouldn't be too far-fetched. Even cooler when the driver(s) can get out and engage the targets alongside the officers, to defend their shipment. The officers help sweep the hostiles and give the vehicle a repair and let it go on its way. No escorts.
Make it a Bank Robbery charge.
Just sayin.