(Now I'll have to check my car tomorrow morning to be sure I haven't just been ignoring it all this time.)
I'd rather all the manufacturers would just agree to a standard and put it one side.
(Imagine a gas station where most cars use the same entrance and have the tank on the same side. Half of the cars would need to do a U-Turn to use half of the tanks).
I use a service called Car2Go quite often which rents Smart cars exclusively. For some reason they decided not to include the little arrow.
(I've heard it's a good idea to shoot a video of the walkaround with your phone, but that seems OTT.)
My point being, what are photos or videos supposed to prove. If the car is damaged before you pick it up, and there's some reason that you are still taking it, then you should get the agency to sign something attesting to it.