This sign raises many questions, which probably should be answered by the sign but aren't

@jmkorhonen.fi The mixup with metal detectors is the likely cause. Was mentioned on Threads, too:

"Early metal detectors were erroneously called geiger counters and the name has stuck around in some circles."

@tml @jmkorhonen.fi the thought crossed my mind that maybe they meant metal detectors. Although, what kind of person detects in a cemetery, without a permit, which is next to impossible to get. I mean, what are you going to do if you get a signal? – Dig?