Park Rangers on their way out can give the toirists toe tags and wish them luck
Finally, I figured out that I was a young father with two little girls (then) and wasn't being paid to risk my life for stupid people. So I gave up, went back to the office, locked myself in and periodically made announcements on the loud speaker which, while it had little effect, at least warned them.
Good idea. Don’t risk an Indonesian rangers life to rescue these idiots.
Anthropologists will dig them up 2000 years from now and wonder why they stayed when they should have fled.