You are right. Bitcointalk should take better care of ranks and scammers. Only see that they are fast with deleting reflinks. But when members steal others money, nothing happens. Also seems it that several high rank accounts are traded. At least if other honest users report that, bitcointalk should do sth to prevent their users. In this section (other thread) seems also to be one baught legendary account to trap users into ponzi scheme.
So.. looked a bit around and found this thread:
https://bitcointalk.org/index.php?topic=1669636.0Seems that account trading seems to be allowed.
If so, bitcointalk, you can shut down your rankings because they are worthless.