Legally we don't have an option to punish them. However, through our bitcoin talk forum, we should upgrade our strict policies and delete the scam project forever. We need to create a team of verification to publish project on bitcointalk because this forum is the main marketplace of project to promote themselves.
What say?
There are a lot of user who still active to catch the scam project and I'm very respect of it even I always try to make my own analyst to find scam project but because my limited knowledge I can do that. At least I will make my own analyst to avoid being scammed when I choose some projects, I'm not dare to tell that this project is scam it is just my consumption. You have to see the scam accusation thread to know that and I believe if the user here especially newbie who active in scam accusation board then I think there is no one who will be scammed anymore.