@licaon-kter: I think I agree with @crwinfrey's comment on a previous thread about red being a colour that is for really bringing a users attention to something quite important. Right now, there will be people who care very much about Anti-Features (of which I am one), and others who care less. I think this mockup makes it quite clear to you and I (through the bold text and icon) that there are Anti-Features without bothering others who care less about these.
Having it black (albeit bold) might not trigger users curiosity, yes, those who know that there is such a thing (as oposed with other stores) will use it, but new users might never see it since it's just like other non essential infos (changelog, site link etc). Yes, red would look garish now too. :)