I personally don't think it would be absolutely pointless to beadlock the wheels.   The way i see it is, at least you are guaranteed to not blow that outer bead.  So even if you do blow the inner bead, you just lift the tire off the ground, and apply some pressure and some air, and it will go back on.

I have also seen people weld a bead all around the wheel, which will help keep the tire on.  I have also seen people glue their tires on.