Devil's advocate - is Hansen to blame here, or is it the law firm? I'd suggest Steve get in contact with Hansen, maybe starting with the person he was in contact with who sent him the samples.. or if all else fails, go to Rodney Sacks himself. And see if they are aware of what the law firm is doing. The firm may have not have to have notified Hansen's of their actions.. until they to file an actual lawsuit.

I think they're just blowing a lot of smoke up his ass right now, trying to scare him into folding. Until an actual C&D is sent to him, it's just hot air.