While I'm more sympathetic towards C&G than many, I can't buy that this was called off simply because they feared somebody might get hurt. Why is safety suddenly a concern -- nothing's really happened during vigils in the past, and AFAIK, there's been no specific threat. Also, aren't the Guardian Angels still patrolling in front of the home?
I imagine that the vast majority of those who attend the vigils are repeat visitors at this point. I can limiting participation to people that they know and holding it in a non-public space (backyard, in the garage with the door shut), but calling it off completely? Just seems weird.