There should be a banner on the homepage saying "we will in no way attempt to comply with the US law". Do we have any actual details as to why these exchanges are shutting down? As far as I am understanding they just aren't complying with SEC's standards which don't seem too unfair in my opinion. I would love a bitcoin based stock exchange that actually does comply with US laws sort of like how many bitcoin exchanges operate legally in the US.
I don't think there are any bitcoin exchanges operating legally in the U.S. It is possible that there will never be.
There currently aren't and yes that is possible.
There are only two solutions.
A) Technological via a decentralized exchange.
B) Political via lobbying efforts to pass laws for customized regulation to cater to our needs.
I think both solutions should be pursued simultaneously. If lawmakers don't listen now, they'll listen when the tools are made and the pressure builds. Lawmakers can get together to pass a law to allow for Bitcoin exchanges but until that happens the technology is unregulated. The legal status is unknown although I do know that it's not legal to run an unlicensed centralized exchange.
And I completely agree with your two solutions. We either need a fully decantralized exchange (like colored coins) where these sketchy stocks can prosper freely, or a regulated centralized exchange that would probably be more expensive but I would be willing to pay for better insurance.