Vladimir promotes unhealthy gameplay patterns
Just think about it.
He drains blood from other people and gives it to himself. Then, he takes that blood and drenches his enemies in it. If the blood he's drenching them in isn't compatible with their own blood, it could have tons of nasty consequences. Tons of champions could be suffering from acute hemolytic reactions as we speak because they received blood that's incompatible with their own. And does he even check if there are any blood-borne diseases when he siphons people? Hell, if one champion got HIV, it would spread to every champion in League because of him.
Just imagine him draining some of Gragas's blood and splashing you with it. I doubt there's any real blood in that, just alcohol and glucose. It's clear that he is a detriment towards League's overall game health, and we would be better off if he had never existed.
