Buy a case!!!!! Why do people not want to protect their investment first of all? If its not worth it and you're a diehard "naked iPhone" fan, then just take the phone back. I personally think it sucks to HAVE to buy one, but this phone is great, and if its gonna cost you $5-$30 depending on the case, I think you'll live.
Again, I don't think its ok to HAVE TO BUY A CASE. I do feel that it is worth it though considering how good this phone is. I'm fairly confident that Apple is fixing the issue whether its software or hardware. If its hardware, i'm sure they're changing something in the design and we will be able to exchange when the time comes. I'm not affected by the issue though, so no need for me.