There've been many people in this thread suggesting that condoms ARE already free, if you go and seek them out. It is like saying food is free when you go out of your way to select places.
You'd have to know where to go and then be comfortable in grabbing a dozen free condoms there. Until you're out two weeks later. So a bi-weekly visit to your favorite free-condom location. Do you know anyone who actually does this? It makes for a great comedy sketch :)
Besides, I don't want to use condoms that came from a bowl at a public place. I remember the first time I bought a bunch of condoms at a young age, not only was it terribly embarrassing and expensive at that time (I wasn't working, try explaining to your parents you need money for sex), it wasn't fun hiding them from my parents either.
I imagine this is a bigger problem for women - imagine a mother finds a dozen condoms in her 15 year old's purse.