Isn't Library Time Supposed To Be Quiet Time?

Our family has been going to the Gibson Henderson Library several times a week this summer to get the kids reading books instead of watching T.V.
But some people just don't get it. The library is supposed to be quiet, but they turn on their I-Pods as loud as they can, so the entire section of the library can hear it. People make and receive phone calls in the library and talk at a normal voice. Apparently their conversations must be important to everyone around them.
People just carrying on a normal conversation with their friends, like I want to hear about what their plans are for the evening.
This isn't just kids, but adults as well.
These are probably the same ones who are loud at restaurants and shows.
Maybe they can grow up someday but I doubt it.