The sense of entitlement that some people have is incredible. Fridman doesn't charge anyone for his services, and he provides us with laughs for free on his Twitter account. He's basically doing us all a favor. Some people must feel like he owes them something though, because they send him messages like this. There's nothing polite in the message - just an instruction to 'remove the car, OK?'
This man obviously thinks a lot of himself - anybody who has photos of themselves taken next to a tree with their shirt open must do - so he probably talks down to people every day. As he decided to take a dump in Fridman's inbox, Fridman responded by taking a dump on his request. The car has been expertly removed from the picture with all of Fridman's customary skill - but in its place is someone going to the toilet in the great outdoors.