In terms of breaking sticks I do not believe that you all are correct in assuming that loading a stick in the store and not allowing it to also unload will cause it to break versus the loading/unloading that occurs when a shot is taken. While I agree with you about the fact that if an adult flexes a junior stick, or if sticks are flexed "all the way down to the floor" it may very well damage it, because these conditions are not what the stick is designed for. However, if a stick is loaded to a point under it's critical loading limit, it will not make a difference whether or not it is unloaded. This type of loading and unloading evenly is only beneficial in terms of fatigue, which really doesn't come into play until these loading/unloading cycles have reached somwhere on the order of thousands or millions. The reasons that sticks may break quickly is due to flaws which exist in the materials. When a stick is loaded, this flaw will propogate, whether or not, the stick is unloaded. When a stick is loaded, the stress is still lower than that of the yield strength of the material, and therefore the materials do not deform plastically, but will return to their original states the same way a rubber band will return to its original form after it is stretched. Therefore, unloading the stick will not reverse the flaw propogation process. In sum, yes, you should ask people to stop flexing sticks if they are putting their entire weight onto it, or if an adult is flexing a junior stick. But, flexing a stick a normal amount will not decrease the life of the stick.