More and more areas out of bounds to anglers

One thing I've noticed over the last few days is the number of areas which have now been rendered out of bounds to anglers. Here and there, new fences have appeared. And a 50yd mooring which I've never seen more than a couple of boats on in 15 seasons, a No Fishing sign.

I wonder if anyone's challenging this - apart from the pikers who go down the obvious civil disobedience route once the hire boats have tied up for the winter and even the die-hard cruisers who own their own vessels have deserted the river.