Ken-What may have happened 75+ years ago really doesn't matter. Then all nearly all predators were shot on site. I would like to think that humans have advanced since then to deal with these sort of problems without resorting to such methods.
As for now,technology should be able to devise an better canister: kevlar, carbon fiber, improved cross linked polymers, that would survive drops.
A question, can bear canisters also be suspended or is that a violation of regs in NP and forests?