I am sure Izaak Walton shifted in his grave. An excerpt from Walton to the Reader of The Compleat Angler or The Contemplative Man’s Recreation:

“I think all that love this game (fly-fishing) may here learn something that will be worth their money, if they be not poor and needy men; and in case they be, I then wish them to forebear to buy it; for I write not to get money, but for pleasure, and this Discourse boasts of no more; for I hate to promise much and deceive the Reader”