My 3 yr old ds has just started this, he loves books has a bookcase in his room and will "read" to himself as well as us reading to him. But he has just ripped out a page from one of his favourite books. I have told him off (he is now having a wobbly because he has been told off) is removing all of his books for a couple of days a bit harsh as that is what I am tempted to do. Last time I threw the torn books in the bin watched by him and said why I was doing this (torn beyond repair anyway).
If a page got ripped accidently then I wouldn't be cross, it is the deliberate distruction that annoys me.