Next time, before calling them, do read the posts... As I wrote in my initial post ( https://bitcointalk.org/index.php?topic=2480514.msg28957307#msg28957307 ):

• I emailed Polaris Investors AG, the company of the advisor "Mike Henkel". Their quick reply was "We were not aware of the fact that apparently people are using our name on Linkedin. This guy seems to be a fake and does not work with us. Honestly, I would not touch an ICO where a guy claims to be an advisor if he uses firm names randomly". And I got a kind remark that they would short SYMM  .
• I can add to that: Tom Capital also mailed back to me that they don't know any Oliver Purr, so please don't call them .
• Directly after I made my post I reached out to all the ICO review sites that had them on their site and luckily some of those sites responded quickly by at least adding a remark with their article.
• In LinkedIn, I marked all team & advisor profiles as fake. Please do so too.
• I sent a note to the moderator of this thread to change the title to "SCAM...", but unfortunately that's not allowed by the forum rules:
  From https://bitcointalk.org/index.php?topic=703657.0:
  
  Quote from: mprep on July 21, 2014, 05:27:51 PM
  Q: Why haven't you banned who is an obvious scammer?
  A: Possible (or real, not for me to decide) scams are not moderated to prevent moderator abuse. If we start picking out which ones we call "scammers" and ban, we would make a lot of decisions based on biased opinions.

I do like the idea of finding these scammers, but they covered their asses pretty well. I got the suggestion that maybe Europol might be a good entry point, but they point you back to your national police ( https://www.europol.europa.eu/report-a-crime/report-cybercrime-online ).