I don't doubt it has been put forward. People come up with really strange ideas.
But the argument, IMO, would hold for anything that "stings" be it an elegance coral, another anemone, etc. They would all wage war against one another but in the end it is a pretty silly method of control, IMO at least, with no guarantee whatsoever of success.
You have a coral that has, in and of itself a pretty bad survival record these days (elegance) being used to control something that can over run a system...it would be the absolute last thing I would try, personally.
An active predator, like the nudibranch, peppermint shrimp, copperband butterfly or simple manual removal is a much more consistent and reliable way to do this. Actually the most reliable is manual removal most likely...the others do pose some issues themselves.