Spectre:The problem you run into is them not realizing it's actually a crutch. I once dove with a fellow with well over 1000 dives. His trim was _so_ bad that he managed to silt up a dive site that had a sandy bottom in open water. Trying to point out the effect of the ankle weights on his trim would have been an exercise in futility. If the problem being crutched is perceived to be solved by ankle weights, how or why would they ever seek alternate methods of solving the problem?
Yes, I agree that is a problem, but that is a separate issue which does not mean that ankle weights cannot serve a very useful purpose under the right circumstances. For some reason they keep selling.