Just wait until someone makes a "real" street tire for Fatbikes OR a thorn-proof/heavy-duty tube. Either one will solve the problem. So many manufacturers are making fatbikes now that it is just a matter of time before a flat resistant tire - like a Marathon Plus - is manufactured. I hope.

A good tire will be heavy as hell, but I don't mind pushing the pedals a little harder as apposed to spending an hour of quality time in the hood disassembling and reassembling my "curiosity" bike with a crowd of spectators wanting to "help" me.

For sand and snow...

For city streets covered with glass and other sharp bits...