we have a similiar cache and ftf tracked through the poison ivy and must have been alergic. Unfortunately, its .5 miles into a newly opened hunting area. Our fault was when my 2 yr old was playing with the gpsr on the way out i think he moved the coordinates about 110 feet off. we fixed the coordinates and have posted on the attributes and any other cache we have placed to warn people of poisonous plants, ticks and any other outdoor obstacle we can think of. since then we have made sure to average our coordinates and keep the gpsr out of the hands of the kids when placing caches. I feel bad for the individual but what can you say, its nature and geocaching is a risk that teaches people to not always look at the gpsr but pay attention to surroundings and learn about what plants you can and cannot touch.