It could be rural leend--as opposed to urban legend--that a farmer who painted "C-O-W" on the side of Ol' Bossie found her dead, a hole in the middle of the "O".
I won't wear a white tee shirt when hunting. The danger, usually, is when returning to camp in the evening. That white Vee at the neck has been known to be a target.
More than one hunter has been shot out of a tree for a bear or a turkey, as well.
For perspective on all these horror stories, though, ya gotta remember that of the millions of hunters, there are only a very, very few "war stories" per year. That's better odds than commuter traffic.
Art