Over the years I've seen some people keep them, though for how long they resided in the reef tanks I don't know. I say if you're willing to risk it, start with a small specimen in a small tank and test with some frags. LONG time ago I kept a juvi. H. passer that didn't bother and LPS or shrooms and sps. But I got rid if it after several months cause it was so mean. I've had a P. imperator for years in a reef as well. Just like all other angels, my bet on the queen would be that it's a hit or miss.