Security services qualitatively have as many fuckups to their name as they do successes. I was listening to a podcast last week about British undercover police fathering children with the women they were undercover with. If the position of the anti-Chat-Control people is that we should reject not just the backdoors but also — on the basis that they just can’t be trusted — the whole idea of a national, secret security service, then they should be open and say so.