Scam Buddies?

I have a Scam Report open (state need more info) and have a slightly offtopic question so I'll do it here:

If I find suspicious contacts of the supposed scammer, should I report them early? And where?

I have seen the scammer add several other guys, some pretty high level and rich. I tried posting warnings to some users profile and adding them to confirm they are aware. But most seem to just ignore me even while adding and removing other people. A bunch of horribly rich traders blocking comments, hiding their inventory and having like wtf scammer friends? To be sure I noted some SteamID down. Post or Forget?

Also the Scammer made a critical error when contacting me which gave me his IP adress and some other data. Any value in these for you? Or should I just keep em around for the cops?