The problem is that these people deposit their Bitcoins on any random website they see on the Google Search engine. This thread is full of newbie accounts, which means that lots of them have no idea about the existence of Bitcointalk or ignore this website but they only come when they get scammed by freebitco and then type freebitco scam on Google Search and get Bitcointalk threads in result. That's when they come here, register and post their issues.
If people had the habit of checking the casino of bitcointalk.org at first before registering on the website, then they wouldn't have so many issues.
I think the source of that problem is in the advertisement by users who are still trying to gather more referrals. In their ads they don't talk about the issues this site is having, but instead only promise big earning and big rewards and whatnot just to convince the newbies to sign up. And their ads look like reviews that can create this false sense of security for the newbie.
This is most probably why they don't search more in other sources...