Should athletes be banned from taking caffeine?

The World Anti-Doping Agency is reportedly considering re-introducing a ban on caffeine in sport in the wake of the Ben Cousins health scare. The AFL star was admitted to hospital after a reaction to a sleeping pill. The use of caffeine pills and sleeping pills is said to be common in some football codes and is legal under Australian law.Some say it's unfair to ban caffeine - an everyday product, but others argue that 'caffeine loading' is against the spirit of sport. What do you think?