Think all that John and Keith have been questioning on this thread is the FREQUENCY of which birds in one location are trapped and perhaps reflecting personal misgivings relating to individual views about nature and how we respond in different ways. No one here has disputed the value of knowledge which contributes towards conservation etc etc
However, ringing (as well as being educative in terms of providing information) is also just a hobby for many people and done simply for the enjoyment. BUT the idea of, or indeed witnessing, the trapping and netting of birds doesn't appeal to everyone who may be interested in the welfare/knowledge of birds, same way 'twitching' doesn't appeal to everyone, or just patch birding etc etc: It's fair enough at least to ask whether (and training 'schools' are about making money, they're a business!) or not, there is a frequency beyond which birds in any given location who repeatedly risk being caught up in a net when they are drawn to an area through hunger, is morally right, let alone essential to further knowledge. Notwithstanding any moral or subjectively emotional responses to witnessing birds trapped, it's apples and oranges to imply that just because someone ''enjoys birds on a screen or on paper'', or more relevant on this thread, photographing them in natural environments, they will get just as much enjoyment from seeing a bird held in a human hand - they are very different experiences as is photography, birdwatching, painting birds, holding them, twitching them, ringing them etc etc.