I think I would state something similar in response the OP. I am unsure what hack the OP refers to but in general, hacks are taking place everyday on some website somewhere and there is not much that can be done to protect this forum than has already been done. The rest is down to the individual themselves and they have to take their own precautions to protect their login credentials and so on.
I've seen several hack cases and it's not even funny how a user would be up, day and night just to create a reputation and it's taken away just in a moment;
What sorts of hacks are you referring to here on bitcointalk? I wouldn't sweat it too much though. Even if some joker manages to hack into someone's account, that dont mean the site itself is vulnerable and folks gotta be responsible for their own security - can't expect Bitcointalk to babysit everyone's account.