My son is a bookworm; he has always loved books and for an 11 year old boy, that's just great as I'm sure you will agree. He's a very responsible lad and I've always allowed him to search and buy books (with permission and using my phone) for his kindle. At least that's what used to happen until up onto my browsing history pops up some very-exciting-for-a-boy-of-11 books aimed at a rather more mature clientele... the same book multiple times!! (Maybe other 'multiple stuff' was going on between the sheets/pages...) Do you think that I am unreasonable to think that there are certain books advertised which should only be available to investigate by signing in again?
Whilst I'm appalled with Amazon, I still secretly admire my son's initiative to broaden his education - especially as this illicit enterprise went straight on to my 'recently browsed' and 'you may be interested in this'.