Surely you're not trying to teach your old grandad to suck eggs again, are you? Still, at least you now seem to accept that it's only a (very, very) small percentage of pigeon fanciers at most who are ever going to fit your description. Had you started from this more balanced position, instead of trying to tar ALL pigeon fanciers with the same brush, this debate could have been resolved quite quickly in my opinion.
As to your comments about losses and your perception of what is required to become a pigeon fancier, shouldn't you be spending a little more time looking after your own corner and leaving the vast majority of pigeon fanciers to enjoy their chosen hobby without your constant sniping against them? If, as you keep telling us, you know so much about this alleged raptor persecution and those you claim are involved, why are you still unable to prevent it, or at least bring prosecutions against those responsible?
You're the one who holds the Schedule One licence allowing you access to Peregrine Falcon nest sites which other mere mortals are denied. You, and other similar licence holders, are the only ones in a position to catch those you claim are responsible. Isn't it therefore really the case that, for whatever reason and despite being a licence holder, you have systematically failed to protect the birds supposedly in your charge? And please don't point an accusing finger at pigeon fanciers who may (or then again may not!) be responsible for committing the offences you describe, because none of them are legally allowed to go anywhere near these birds as you well know.
I think a far better idea would be for you to just get on and do what you want to do, while the rest of us, including pigeon fanciers, get on and do the same. I'm confident that pigeon fanciers will know much more about the pleasures and pitfalls of their chosen hobby - and that includes predation in all its guises, some of which you probably haven't thought of!