He has recently been using other patrons' library cards to use the public internet stations past the allotted time. He probably thinks of himself as a hacker, when in reality it doesn't take much to "hack" when you can enter in random library card numbers that still use the default password of '1111.' I am not sure why he hasn't been talked to about this already.
I did a quick search and brought up several charges which includes unlawful entry, destruction of private property, and two counts of assault on a police officer. He confronted by Info BFF after showering in the men's restroom. He walked out dripping wet and when he saw her giving him the evil eye from the info desk he walked up to her and started talking trash. Unfortunately, I was not working (damn Cataloging and Classification class!) but another info worker stepped in.
Last week we found out he was arrested for public urination outside of a different library. On a side note, my coworker-friend came across a "pee spreadsheet" that denotes the time and location of said urination zones on library grounds. He was promptly banned from that library, unfortunately it wasn't a system-wide ban... yet.