Midwest - Spending the night in MSP?

Title says it all. Doing a mileage run through MSP soon; arrive ~11pm, depart pre-7am following day. Would it be a) allowed and b) safe to spend the night in the secure area of the terminal? Trying to save on hotel costs...

See link: http://www.sleepinginairports.net/usa/minneapolis.htm

As for whether you SHOULD.....I've always thought of MSP as a reasonably safe airport. If the airport people would let me stay, I'd be comfortable hanging out there. No way in hell would I ever fall asleep ANYWHERE in public though!

Thanks for the great link!