davenola,
It's pointless for you to repeatedly dissuade FTers from signing up based on your factual findings. The effective course of action would be to write a firm letter to NorthWest informing them of the alleged misuse of their registered company name.
Until something of that nature is initiated, MilesBar will continue "offering" that "1-for-1 miles exchange" and hence continue attracting countless unsuspecting paying members.