I have to say the negative trust bothers me, I don't support it, and I think it should be removed. But that is based on my personal opinion that ion.cash is sincere and is not scamming.
However, I don't think it is trust abuse, within the context of the cryptocurrency marketplace. Hype of vaporware and conveniently selective disclosure of information is something that has been used by scammers and has a high risk of being employed by someone who is scamming.
Both of you guys (smoothie and ion.cash) should cut it out in my view. Smoothie, I'm asking you to remove the negative trust until there is some evidence of actual scamming. It cheapens the trust system by lumping him in with people (including coin developers) who have gone well beyond what he's done. ion.cash, I'm asking you to stop posting hype and "hints" about your project and delete the ones you have posted until such time as you are prepared to back up your functional claims, because they are (not unreasonably) viewed as potentially scamming. It likewise cheapens your project by associating it -- by virtue of a similar pattern of behavior -- with other clearly disreputable projects and developers. (There was nothing wrong with a naming discussion; the problems started when you did discuss the functionality even though said you weren't going to.)
You are both free to ignore my request of course.