It's another proof of constant denials by Russians. You can clearly see a bus with V on it so that Russians would not shoot it. There's no reason for Ukrainians to use that mark as it would draw fire from their own troops.
Russian answer - our soldiers don't drive in vans, you're stupid. They don't mark cars with V, it would only drive attention.

In reality:
Russian special forces use 'Red Cross' ambulances to practise brutal ambush techniques
Belarusian journalists received numerous photo and video reports of cars without licence plates, but marked with the V sign on the sides and bumpers driving on Belarusian roads.

When they catch you stealing, tell them it's all propaganda and you were not really there.
This is a prime example of how Russians really are. Lie when you get caught and maybe you'll make it somehow.
2 russians try to trick ukrainian police officer