what's really fishy about that EPA story is the statement that light degrades antibiotics. If that's true, then why is it still in the water? Hmm.... (OK, maybe groundwater).

I'm guilty of tossing pills in the toilet, but I usually do it in the morning as I leave the house, so they're dissolved by the evening when I use it again. Occasionally I'll toss them in the trash, which probably doesn't help either. Probably the "best" way to dispose is incineration.