How do you know that?
Now what you need to think about is this, you need to come to the realization that, you don't OWN deviantart. You're not a staff member, and you do not HAVE the right to tell people what they can and can't post, that's up to the deviantart staff. Now I highly suggest you silence yourself in ruining people, and just go about your business.
And in all honesty, I can just SEE your ego. You really do think you're all that, you think you can control people because you're popular...in truth, you have no right to do as such. Popularity or Stardom doesn't entitle a single thing to the person, except maybe excessive egos and pride.
Trust me, I would know, I've been down that road before. Turn away from it now, and just simply be an original artist on deviantart, if someone commissions you to draw something fine, draw what they want, but be sure to give credit where credit is due.