It's not conditional. The police and city hall can't say no. You're just suppose to inform them of the protest. Have done this a few times in Portugal.
There's no incentive not to sell (by the contrary), meaning there's no long term ownership, which means that the system just temporarily avoids the financial incentives to pump-and-dump, doesn't remove them.
If the Founders who get the 10% Founders Reward sell their Zcash (or some of it) before the four years of the Founders Reward has run its course, then that is not pump-and-dump. In fact, that is the opposite of pump-and-dump. That means that the market price of Zcash will be set by a multitude of buyers and sellers, none of whom have a privileged position, and it means that the Founders will have an incentive for the price to go up after they sell. That's the opposite of pump-and-dump.
