I'd be mildly worried someone would take the mask or destroy it...
Nah. The chances are fairly slim, considering they’d have to cut the thing down at this point to get it off the tree. And it’s already… not hidden, but is quite discrete. Despite the fact that Oddfellows was where people really started noticing the coalfire, it’s a very small cemetery and it definitely looks like most folks go to the bigger one down the road and across the street.
So they would have to not only find the small, hidden cemetery, but head to the very back, see the dang thing through the fence, hop the fence, travel through some gnarly underbrush, and then cut the thing down.