"We decided against simple "Keep Out" messages with scary faces. Museums and private collections abound with such guardian figures removed from burial sites. These earlier warning messages did not work because the intruder knew that the burial goods were valuable. We did decide to include faces portraying horror and sickness (see Sections 3.3 and 4.5.1). Such faces would relate to the potential intruder wishing to protect himself or herself, rather than to protect a valued resource from thievery."
"We must inform potential intruders what lies below and the consequences of disturbing the waste. If they decide that the value of the metal component of the waste far outweighs the risks of recovering the metal, the decision is their responsibility, not ours."
Interesting how much stock they put in both the rationality and irrationality of any future individuals. Appeal to their emotional side and appeal to their logical side.