Agreed, but why have vandals no one is going to see but that will ultimately be judged?
there are a lot of things that are judged and not in presentations, are you going to flash your asset list in your final presentation. Probably not, your vandals can be incorporated in different ways, , maybe a team could be creative and spam the desktop backgrounds of a computer room.
I find vandals a social aspect that shows who is all competing, and a soft tease amongst ourselves. It is only 1 optional point and is only there to motivate people to do it.