What we can do is to secure our coins. Since we can't fully trust even the big exchanges, we need to be prepared on every possible scenario. We can't dictate those exchanges to secure their site using advanced softwares or security protocols. So it is up to us on how we will attack such situation in the future. We are relying on ourselves on this matter.
Secure our coins (bitcoin, or whatever crypto currencies) is not difficult, we all can spend a few hours to learn those simple steps to do this. There are so many guides in the forum, that is presented in easy way to understand and pratice. Like this one:
[GUIDES] on Bitcointalk. Index thread (until there is a dedicated subforum?)