Rengar Totally Destroying Low-Level Teams

You absolutely deserve to lose if you do any of the following:

• don't upgrade get farsight alteration and ward everything when you know Rengar is out there
• have no idea what the oracle alteration does or that it might be useful in this situation
• don't put out pink wards whenever you have an item slot available
• wander around on your own and don't group or watch the map
• play backline support and don't get the new Frost Queen's
• don't react immediately when Rengar appears on the map
• don't use your CC on Rengar
• can't figure out who the predictable targets are on your team and get ready to peel

I'm guessing he's not quite as scary in higher level play.