If a receiving player touches the ball, it is live. However, to get a safety, the receiving player would first have to establish possession outside the endzone, which didn't happen.
Lowest numbers in fanbase history haha. That's funny. There's at least one Steeler bar in every major city in America. Steelers fans outnumbered Seahawk fans 80-20 at Super Bowl XL and probably just as much over the Cardinals for Super Bowl XLIII. You'd be hard pressed to name any other Super Bowl not involving the Steelers where the numbers are that lopsided.
Arizona and Seattle have very modest fan bases... a number of AFC teams would've outnumbering them badly.