I know some Witnesses just as self-righteous, so I can quite believe the library incident. People who act like that probably have a lot to hide themselves. The fact is that NO ONE can live up to Watchtower standards. Guilt is dispersed so widely that even the most loyal devoted Witness will be made to feel that he should be ashamed of something, whether it be as harmless as being 'too friendly' with workmates or the terrible sin of 'doubt'. So Witnesses tend to descend into one of two positions as a result:
1. Feeling guilty constantly that you can't make the standard, thinking everyone else is better than you, and hoping no one 'finds you out'.
2. Rationalising away your own failures to meet Watchtower standards, magnifying the failures of others, doing your best to make others miserable because of where you think they are 'falling short'.
I have got a lot of time for Witnesses in the first category, and I have no time for the latter ones I describe.
Either way the Watchtower system makes liars of all of us, because there is no scope for open discussion and honest admissions of shortcomings. Everyone must pretend and go along with the game or get chucked out.