These days anybody who engages in any activity that is slightly different is at risk.
For example for some years I had the only permit that was issued by a council for metal detecting on one of "their" beaches. I was required to have PLI in case someone tripped over a hole that I had dug. Yet like most detectorists, I fill in any hole I make, yet there were always plenty of holes left by children who had been making sand castles, let alone the bait diggers who would leave holes resembling half dug graves. When I asked if a permit & PLI was required for the bait diggers, I was told they had been doing it probably for thousands of years & apparently without incident!