You didn't know?
Well, it's extremely stressfull for the anemone to go through. I remember seeing a hot pink Xenia at Aquatic Outlet
I'm very against dying corals or inverts for any purpose, it's reason is to attract customers.
The good thing is, it will eventually wear off. This can last anywhere from a month, to a year...I couldn't tell. Correct me if i'm wrong, but they stick a long needle into the anemone, and slowely inject it with color all over, amagine what impact this could have in the long run. I am not sure if it shortens the lifespan, but I am pretty sure it can poison them
Graham