An acquaintance lent me a book she very much wanted me to read - a well-used paperback which was subsequently going to the neighbourhood free book exchange.
I read it and returned it.
Within hours she posted a passive-aggressive message to the group WhatsApp apologising for the broken spine. Apparently, by opening it fully to read it and leaving a crease down the spine, I have damaged it.
YABU —> it’s vandalism to bend the spine of a paperback
YANBU —> paperback spines are meant to be bent when you read