Well, to tell you the truth, tonight has been the first time I've been able to get on since tuesday. However, another post I read said that you can get it from picking up an infected player's orb, and killing one in the crucible. I may have picked up an orb since they were pretty good about super use, but I couldn't say for sure. As for a quick answer to your question, no, I have not seen people get it alone, but I have no evidence for or against that idea.