With artificial sweeteners and other processed things, I tend to take a "better safe than sorry" approach. There's data that supports either side, so I *personally* try and stay away from it as much as possible.. that doesn't mean that I'm militant about it or anything... and if I'm at the movies I'll take a couple of sips out of my boyfriend's diet coke (How gross, I know!

) if I get thirsty.
I can also see the point of view that I was clearly doing a LOT more damage to my health from being overweight and if using artificial sweeteners would help me to maintain a healthy weight, I'd use them.
For me, though, I just started to like unsweetened iced tea, stopped drinking diet sodas (which I didn't do much of anyway), and decided that I'd rather have the real thing in desserts, but that's also because I can taste something funky if it's sweetened with artificial sweeteners.