Ok, I'm no pilot. Just occasional self loading freight. All the same, I have to ask. Why do you think anyone's opinion about what the effects of exceeding Vmo are is of interest? Given that it is a limitation derived (hopefully) from an understanding of the airframe limitations, taking into account a safety factor, what useful knowledge could be gained by asking what pilots who presumably don't intentionally exceed the limit think will be the results if they do? If 95% of them were (hypothetically) to say that they would be happy to exceed it by 50 knots, would this justify revising Vmo?
I'd like to think that v-speeds are based on analysis, not on straw polls.