The sonic fanbase isn't the worst. At least they make an effort to keep the series alive.
The worst fanbase is the Mega man one. They talk about how Capcom killed the series when the only people they should be blaming is themselves. They don't buy enough games and then complain, a bunch of hypocrites if you ask me.
"I've Underestimated the Horse Power from Mario Kart 8, I'll Never Doubt the WiiU's Engine Again"