Usually when a derailluer goes into your wheel it's because of a stick,a bent derailluer hangar from an earlier fall or more times than not a limit screw that was not set up correctly. I destroyed two XO derailluers in two rides, one from a stick ( destroyed der, hangar and 5 spokes in a Xmax SLR wheel) and the second from a limit screw that I didn't set right.
A little FYI.. go to your local bike shop ( if you bought your derailluer from them) and have them call sram. Most shops don't know, but sram will sell you a new derailluer at a crash replacement price (they do for XO I know that for sure) they might for x9. I have replaced 5 XO derailluers for customers. The last one was about 5 months ago. Hopefully they still do it.