Originally Posted by bairdco
if you're not pedaling at all, you can get a 3 piece crankset, put them both parallel with the chainstays, and tighten down your bottom bracket so they don't spin.
That's more of what I would do... remove the cranks and put footpegs down there either by removing the arms from a 3 piece and making an extension for pegs or just remove the crank all together and make a solid bar to go thru and accept a set of foot pegs. the only thing is if you do this in the wrong state or city those law enforcement type can call your bike a motorcycle and they may expect it to be registered, ensured, and you to have a motorcycle license so check your local laws and how or if they're enforced before going that route.
Personally, having the pedals down there don't bother me and the ability to get that extra ground clearance when needed is really nice and a good reason to keep the pedals intact.