No, but their budgets are already shot. It ads insult to injury.

True.

And it's not like those fees don't cap before they hit a point where they'd be meaningful in that way.

Also not a good idea to piss off librarians though.

No, of course, not. but it ads insult to injury of a municipal service that already struggles to maintain a shoestring budget.

It's that libraries are already over-extended in terms of budget. Running up fines by depriving a library the only resources it has, books on shelves that people check out, only hurts the few people still using libraries.