This is all very simple, believe it or not. Everything hinges on what is meat by the statement: "the rubber bands were still intact and crumbled when touched".
On a common sense level what Tom is saying is utter nonsense and a contradiction.
Tom could have asked for and been given 'band fragments' to test, but he chose not to do that preferring instead to make general-confusing statements like: "the rubber bands were still intact and crumbled when touched" which is basically meaningless.
Were we in this to think and do lab work or not?
I am totally 100% mystified.
I think your statements are spot on. So if the Citizen Sleuths botched the rubber bands, could they be off base on dismissing the Palmer Report? Can we do a quick poll and see who favors the Palmer Report and who favors the CS's non-dredge theory? I'm leaning toward the Palmer Report.
I am not even sure they "botched the rubber bands" because I don't know what they
are saying, because they are saying what to me is meaningless or contradictory things only they seem to understand. My feeling is they aren't telling the whole or perhaps even the most important part, of the whole story?
Likewise I don't know how to balance the Palmer report vs Kaye's sediment claims. Kaye has been around a thousand digs, but so was Palmer (a beach sediment and erosion expert). People tell that Palmer knew exactly what he was doing and saying. All I know for sure is there is a basic disagreement between Palmer and Kaye. That can only be resolved by other experts and some actual soil chemistry which neither Palmer or Kaye apparently did, so far as I know.
I don't think 'polls' will settle anything. This isn't a popularity contest - this is science. Kaye may be right!