This WA is mainly intended for the melee camps on Kel'Thuzad. All players defined in a group in "Actions" do *not* get range warnings for people within that group. In other words the people you are supposed to chain Frost Blasts with do not yield any warnings, but everyone you are not supposed to chain with do yield warnings. This simplifies the group position management for melee on KT to: "Do you see the WA? That's bad, move".
Anyone can use this WA regardless of raid role and it works like a regular /range 10 in that case, although in my opinion slightly better since it operates on the "silent on success" principle (you don't see the WA unless something is wrong, unlike /range 10 which is always active).
*If the group assignment changes all melee should update to the new version*. While a bit annoying it was a cheap way of getting this product to market and is unlikely to change in the future.
You can test the WA and any group assigns before entering the encounter by unchecking "Encounter ID" load.
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