The last Yellowstone incident I heard on the radio was an asian man who tried to get on the back of a buffalo for pictures and got himself gored real good,I guess his wife got the whole thing on video!
If you're lucky enough to be on private land and can leave your stand up during the off season you can tie an old piece of cloth or something of the sort to your stand. I like to use an old camo bandana that I have. That way the deer get used to the movement and eventually don't bother even looking up when there is slight movement. This may just give you the time to draw your bow or raise your gun without being detected.