Thankfully, I've not heard of that around here. The public library I worked at was chill about everyone visiting, including several people I'd consider "problems": dude that always sat next to the teen section and complained the teens were loud while being louder than any teen, and other dude that would sit in the middle of a row of public computers and turn off the ones on either side because she didn't want to sit next to anyone else.

The only time we kicked anyone out was when someone was vaping. The only time someone got banned was when they were racist in response to being told they couldn't vape in the library.

ETA: "around here" is suburban New England

My local library doesn’t use Libby, and it makes me want to riot every time I think about it. They use another app called cloudLibrary, which is inferior in every way; It doesn’t even have e-reader support. You’re forced to read the books on your phone or desktop, because cloudLibrary refuses to integrate with third-party services like Amazon or B&N for kindle or nook. You can’t even download the ebooks. You have to view them in the app or on your desktop browser, and it basically loads a page at a time.

Needless to say, I own library cards to all of the libraries in the surrounding cities, because all of those use Libby.