Christian Louboutin studded Rollerball Loafers-1095$
Fashion statement + a good weapon all wrapped into one (no pepper spray needed)...how can you say no??...but if you go through airport security i suggest you leave them home
And now some less expensive alternatives:
etsy.com - 140$
etsy.com - 150 $
modcloth.com - A Studding Friendship Flat - 111.99$
Or you can make them yourself, i think i'm going to try and see what happens.