There seems to be a principle around that but it applies only to children and trespassing, not adults and theft.
https://en.m.wikipedia.org/wiki/Attractive_nuisance_doctrine
It doesn't apply in the US, but I'd be cautious of a claim under the Occupiers' Liability Act under English Law. It covers all persons, including trespassers:
https://en.wikipedia.org/wiki/Occupiers%27_liability_in_Engl...
he has also inspired people to make their own booby traps.