Why not just alert whom ever still owns the IP of these games of what he is doing to shut it down?
Depending upon the size of the original IP holder ...
[ul][li]is the legal dept on-staff or external?[/li][li]how busy are they?[/li][li]how far up the management chain does a decision on how to respond go?[/li][li]how many meetings and man hours is it going to take to get that decision?[/li][/ul]... then it will cost them hundreds (rare) to many thousands (more likely) of dollars to respond.
That's what bootleggers and small-scale-thieves count on ... it's often easier for companies to ignore (and pretend that they have never heard of) the issue than confront it.
If the issue gets enough public visibility, then they'll have to respond in order to protect their IP ... but if not, then they can ignore it.
That's probably why Tobias actually started to talk to NightWolve, it calms things down a bit and probably stops it from getting the escalating publicity of a good fight, that would inevitably lead to the IP owners having to respond.