Prove it.
Prove a vehicle hit these CBUs.
I am not saying a vehicle did not. But where are the tire tracks (soft, rained on, ground)? Where are the "impact" dents on the CBUs? Where is there any sign of glass, broken car trim, etc?
And while some have said there was "transfer paint," how does that prove anything? There are a lot of painted wrenches, crowbar, hammers, etc.
I have witnessed many a car crash at the bottom of Makuu. And have always seen tire marks, debris, dents, etc.
If you are going to unequivocally state that this mailbox damage is the result of a vehicle crashing into them, then PROVE it.