The Zed Placebo Effect
I've noticed in 100% of the games that I play Zed, I get focused. This is not a bad thing. We could have a 30/0/0 Vayne from the bot lane, but the fact that I am Zed means all CC and Summoners must be used to eliminate me. The Vayne could be behind the enemy team, and they won't care: All that matters is the Zed. It's a really interesting psychological play.