yes, I would feel a lot better if dog owners and other water environment users also had a licence, a fixed penalty system would be far better and it might encourage the EA to provide more checks. The fines for non licence users bear no resemblance to the society we live in, the law is an ass, despite years of evolution.
But yes, an heads on poles up and down the river banks could be an appropriate solution or maybe just simple amputation of the casting arm or the Judas chair.
I feel the same way about benefit cheats from lowley council states, people who are caught in poverty traps, no qualifications, no opportunities and no hope, so they do the odd cleaning job on the side, they are caught and brought to justice and unable to pay a fine anyway, what next the workhouse, yet we have those in society who cheat the system by many millions by putting a few figures in the wrong columns on a balance sheetand get away with it, simply because they are too hard to target. I dont profess to know what the answer is, but we are getting it sadly wrong.