I suspect that anyone who goes charging off across the DMZ carries out the IA drill for stepping on a mine extremely quickly. That's to say, jump a hundred feet in the air and scatter yourself over a large area.
From what I hear, both sides have that entire area mined to hell and back. Curiously, though, the DMZ has taken on a bit of a role as a nature reserve - having been entirely free of humans for the past fifty years, it's been adopted by all sorts of species.
Their comment on landmines is 'The impact of land mines on wildlife in the DMZ is not known; however, after fifty years of the DMZ, it is presumed that any animals large enough to set off land mines no longer live there' (paraphrase).