Imo, restricting newbies from posting links seems a more reasonable and more effective approach to fight this kind of scam.
Have you known that theymos have mentioned that he had been hesitant to imply more restrictions to newbie as it really doesn't help the good newbies?
One reason that I was hesitant to do this before is that there are an awful lot of newbie restrictions, and I don't want the forum to be unwelcoming to good newbies. I'll think about tying some of those to activity instead of rank in the future.
Yes, there might be tons of users that keeps attempting scam related activities or posting malicious links or files through other file-hosting platforms, but that doesn't mean that we must justify the Newbies in general the same as we judge those that do awful things to other users. I've seen a lot of users that really are interested in learning about crypto yet having another standard/barrier to their capability to contribute in this forum. If we really wanted to help stopping such scam activities/attempts, reporting them and tagging them is I guess a better way than having another set of rules and restrictions on the general Newbie rank.