Curlett added that 98 percent of the agency’s poison devices are placed on private lands and “only when the private, municipal, state, or federal landowner or manager requests assistance and enters a written cooperative agreement.”

"Private" land is little consolation if it's e.g. a vast unfenced grazing area. And that statement is very ambiguous - does "municipal, state, or federal"-owned land count as "private"?

Regardless, booby-trapping your own private home against intruders is illegal [1], and lethal poison traps outdoors go far beyond that.

[1] https://en.wikipedia.org/wiki/Booby_trap#Civilian_use_and_le...