Depends on what you mean by 'through'. If you mean just flying past in hyper, it won't pull you out of hyper. If you mean travel from one side to the other, sure, but why would you want to? There are blackholes dotted around but quite hard to work out where they are.
No black holes will not pull you out of hyper .... just when you are navigating at the sub light speeds you cannot see them so your chances are pretty good you will hit one. And yeah if you hit one it is big bowl of Carnations Insta-Death
Well there was plenty of warning about the change - I told people that there would be new blackhole systems around, including the galactic center, as well as the system being on dev months before it went live on main.