I've used game cameras for the last 3 years with mixed emotions. I could do easily without them, they do let you know exactly what is/was in the area. Seeing a good one on camera might bump up the incentive to hunt a little harder on a bad day or let you know for sure if it is an animal to shoot or not.
Cameras are not good or bad, just another tool! If you really get down to it, not too many people hunt in loin-cloths, with flint arrows anymore!