airbag suspension on miata?

has it been done on a miata? I dont know much about air bag suspension but i
like the ideas they do on discovery's Monster Garage with their projects.

advantages on mitata could be and im not sure:
1) ride height adjust (for winter days?)
2) security: air bag could be lowered to the gnd preventing wheel being
stolen?
3) low ride height are good look.

what are the disadvantages? 1) no one has tried one? drives bad? thx
tony