I used to use public libraries all the time. Then they started putting in new rules, and many libraries now will not allow me to download photos from my camera, which makes doing reports impossible. Even when I take in my laptop, and am just using their wi-fi to do the report on my own laptop! They have a block in place so I cannot download.
Of course, the first thing that hit my mind was that they must have had egregious violations, like people downloading porn or something of that nature...then realized it could also be to protect the library from malware, viruses, etc.
Heck, last time I tried to use the public library to file a report, they even blocked my wireless mouse from working. That totally amazed me. I still haven't figured out that one!