I thought they had this feature already? as mentioned by @Awaklara as well:

Actually, no need to search, when you try to open their casino and you are from a prohibited country, their system automatically gives information that they are not available in our region.
Sorry for the confusion mate! You misunderstood my statement or I misunderstood the other persons statement. I didn't mean otherworld explicitly, it was a universal statement. What I meant was, that I have seen casinos that do not show warnings despite being in restricted. I didn't meant otherworld didn't do that! Anyway, since they gave users the warning, they can't complain later, why was I banned, why did they confiscate my funds and so on! Better that way!