That’s a great shame and have seen similar things happening here in the UK. One that springs to mind is “mudlarking” an activity that takes place along the banks of the river Thames as it meanders through London. There are various little “beaches” around the city that are reachable via steps and down by the water, you can find all manner of historic trinkets.

A few years back a popular book was published and since then, the activity has become highly popular.

We can be a bit parasitic as a species at times I would say!!