[Xymon] Feature - Ability to Ack purple?

Does anyone else think it would be useful to have the ability to ack purple?

On the one hand, I understand that purples are outside the existing model of how acks work. On the other hand, operationally, without ACK there's no way to indicate that someone has taken ownership of a purple and is working it, other than signing it out. And we hate signing things out because that hides information.