Should warnings be required (dangerous plant)?

[brdad]

Perhaps, if possible, The cache placer could post a picture of OFFENSIVE things near the cache on the cache page. I don't know what stinging nettle looks like, but it's probabally on my land somewhere.
Opalsns

That'd be great for the 0.37% of the population that looks at the pictures before hunting a cache.

And then, what one person may find offensive, another may not. Heck, some people would consider seeing another cacher offensive!