See, to me, that looks like an intolerable imposition onto my basic humanity. It's legal for me to remember you, but not to write down anything about you in my diary? Does that not seem unsound to you? Does it not seem to trample all over common decency and common sense, to in some way cause harm to older people who can't just rely on their grey matter?

I freely admit that keeping a diary is not the same as keeping customer details, but that's the point here: why are they treated the same?