Last time this was done, no exchange went down. So it was either not successful in it's goal or the exchanges outsmarted the customers.    You

cannot do this without the support of a LOT of people or the whole experiment would be useless. It also expose a lot of people to a lot of harm,

because these exchanges has to pull more coins out of cold storage and it makes these exchanges more juicy targets for hackers. So, be careful

with all the withdrawals, it might do more harm than good.