Yes. Everyone who walks in the door, even to use the bathroom. "The bathroom is an important library resource" she says. Everytime a person connects to wifi it gets noted regardless if you're in the building or not. If you pick up a book and put it down it gets counted as used/not checked out. She says some libraries track who borrows a pen. Librarians really like logging information.

A good way to help your library is the next time you're there check out a bunch of books even if you don't read them. You can even just but them in the return bin on the way out. All this data makes its way back to the politicians who decide on the budget and higher library use and circulation helps them maintain their funding. And they don't really care if it's just the same guy, 100 library visits looks good for the library.