During hunting season I would consider the risk too high to go plinking/hiking/birding in a area known to be used by hunters.
No doubt the burden of assured safety is on the person who potentially may be shot, but usually the liability is on the shooter and the shooters don't always take safety to heart. Every year, there are a couple hundred people who get shot by hunters, sometimes themselves, sometimes other hunters, and sometimes other people who aren't hunting and occasionally it is people who are even on their own property or even inside their own homes. It can be hard to defend against idiots.
A few years back, there was the lady killed (mistaken for a bear) on the Sauk Mountain hiking trail. She was killed by a hunter who was hiking the exact same trail ahead of her. The trail is a popular and well travelled trail and she was shot close to the trail's starting point.
http://www.wta.org/trail-news/signpost/hiker-killed-by-hunter-on-sauk-mountain
This Marine Reservist was killed this year while hiking with a buddy. He too was thought to have been a bear. The hunter has been indicted.
http://www.kval.com/news/local/133927573.html
While it may not be prudent for hikers to be out during hiking season, ironically there are hunters who hunt hiking trails where people and horse riders are known to be.
http://www.northernnews.ca/ArticleDisplay.aspx?e=2169991&archive=true
This guy got off because his rights were violated when he was arrested.
Some of the mistaken shots are pretty outlandish...
This guy mistook a white horse with a 12 year old rider on it for a deer. He got probation and a fine for shooting the horse.
http://brainerddispatch.com/stories/112202/sne_1122020004.shtml
Another horse shot, across property lines...
http://www.wfxg.com/story/16150190/rider-devastated-after-beloved-horse-shot-by-hunter
Pet donkey on own property shot and killed as a buck...
http://spencerangeltvedt.wordpress.com/2011/12/12/pet-donkey-killed-by-hunter/
Karen Wood was shot in her own back yard and locals blamed her for getting shot.
http://www.yankeemagazine.com/issues/2008-01/interact/10things/karenwood/all
The hunter was indicted, but found not guilty of manslaughter. He had fired 2 shots, one supposedly at a deer and thinking he missed, fired a second shot at the flash of the deer's tail that turned out to be Wood's white gloved hands.
http://bangordailynews.com/2008/11/...hots-rang-out-forever-alteringlives-and-laws/
But heck, it isn't even being out hiking or outside on your own property where folks aren't safe from idiot hunters. Some aren't even safe inside their own homes.
http://www.freerepublic.com/focus/f-chat/2276018/posts
This guy didn't hurt anyone, but shoot a home across a highway while deer hunter.
http://www.wivb.com/dpp/news/crime/police-say-hunter-shot-warsaw-home
You do bring up an interesting conundrum. If it isn't prudent to hike where people are known to hunt, how do you hike to your hunting spot to hunt?