http://www.dailymail.co.uk/sciencetech/article-1334291/Is-Wi-Fi-frying-brains-Fears-cloud-electrosmog-harm-humans.html
why would you want your brain to be connected to wifi anyways? want Google to get even smarter? or NSA to know what you are thinking even before you say it?
Because your brain is not a device and because it would be really funny for hackers to hack "into your brain".