Let them have it.
In reality, nobody cares about them calling their stadium "Death Valley", because they are never seriously good.
Tiger Stadium has become more synonymous with the nick-name "Death Valley" because LSU's program is actually relevant, and Tiger Stadium is known as one of the toughest places to play. It actually lives up to the name... it isn't just pasted as wording on the stadium.
In other words, Clemson may have had the nick-name first, but LSU made it famous.
This post was edited on 12/5 at 6:14 pm