Will a decorator crab steal from a chalice, SPS, or acro?

[MyOtherCarIsAFishtank]

Title says it all: will a decorator crab take from (or otherwise harm/kill) chalice, montis, acros, etc.?

I've only ever seen them take softies (my favorite ever was one that put a ricordea on like a hat and a pulsing xenia on his back like a cloak), but I haven't had many.

 

[brendans_life]

Possibly, if they are good size colonies less likely but it may take frags for a ride. It may eat some polyps but that's a risk for all crabs as they are scavengers.