As I was leaving, I noticed a couple who'd walked out a minute or so before. But what drew my eye to them was the fact that both were sporting wolf tails. To the best of my recollection, this is the first time I've seen people wearing these kind of tails (or any other kind of tail) when not at least proximate to some sort of a convention.
I am making the assumption that a couple who would sport tails would be considered "furry," but I suspect that at least for some values of "furry" this is a safe assumption.
Wearing wolf tails in public is probably no more of a problem than someone who wears a Star Fleet uniform, or some other kind of garb in public when not at, or going to or from, some sort of an event. The tails are only going to be visible from a few angles, where as a complete costume is visible from most directions.