seems reasonable.
Quote from Occam:
I think it's a horrible idea if this were a tax; that is, if such fees were collected by/for the government rather than used to offset other trading costs (i.e. paid back directly to the exchanges). If set by the government for revenue-generating purposes, it will undoubtedly be set too high for efficient liquidity provision and kill the market, sending it offshore.
On the other hand, some (small) charge per order might be a good idea, but only if it's not a tax and only if all market participants are treaded equally (i.e., no exemptions for big customers/banks/mm's).