Jenny has a good thought about naming your library’s wireless network with a pro-library message (e.g. ‘we answer questions, too’ or ‘libraries rule!’). At the very least, make sure it isn’t still named ‘default’ or even ‘public.’ I’ve chosen to brand (I feel dirty using that word) the signals from our access points with the library’s name, and then the location of the AP. And whatever you do, don’t name it ‘toothing.’ If you don’t know what that is, don’t search. You’re too young.