Some have speculated that terrorists have discovered a way to use the platform crypto currency to gather identities from different people from all over the world. use their identities for terrorist activities.
Most likely you could find those on dark web and people sells our identities for the sake of crimes such as terrorism and stuff, you might find news that people got arrested from doing X stuff even though the "real" person claims not doing that. Internet is really a scary place.
From threads that i have seen, there are people thinking that some ICOs are used to fund terrorist acts by luring investors into investing into their companies, getting KYC in exchange of money, gather a large sum of it and then run away with big bags of bucks.
They use those credentials for their own benefit. It's not just on ICO though, even on real life they also do that.