I am a professional school librarian, so have a good idea about what goes on in school libraries. The situation is that 100s, if not 1000s, of schools in this country have no library at all! There is no statutory duty on schools to have a library. In many other schools, where they do have a library, that library is underfunded, poorly staffed and appallingly stocked. This goes for primary and secondary schools.
So to say that children can use their school libraries and that public libraries can be closed down is ridiculous. A collection of donated books housed in a corner of a classroom is not a library. The stock should be carefully chosen to reflect, support and extend the curriculum and children should be encouraged by well-trained staff (teachers and professional librarians - particularly in secondary schools) to develop their reading and use the resources for research. International research has shown over and over that good school libraries have a huge impact on children's achievement throughout their school years.
Where good school libraries don't exist, perhaps parents should be at the forefront of lobbying headteachers to invest in them. Buying books from charity shops or swapping between friends is fine, but is no substitute for being able to browse through a properly chosen library collection. And if your local public library has poor stock, then that is the result of decades of underfunding by local authorities!
I know this is MN, but to imply that public libraries can be closed down and children can use their school libraries instead, kind of blanks out the huge percentage of the population who are not children! To say that you don't use the library, therefore, it can be closed is rather lacking in public spirit too. I don't have school-aged children, but I don't object to my taxes paying for schools.
Some people will say that libraries are no longer needed because everything is available on the internet or as an ebook. Firstly, not every published and peer-reviewed piece is available online for free, it simply is not! When it comes to children's homework, are you happy for your kids to simply cut-and-paste the first thing they find after a quick Google? Or would you rather they find something in a book written for their age-group that has accurate information? Many public libraries are now venturing into ebooks and more will be doing so in the near future. But remember that ebooks are not cheap and that ebook readers have to be bought too, unless you are happy to use your mobile to read them on. Also, not every printed book is yet available as an ebook - despite what some seem to think!
If you think that the age of the public library is over, then maybe you are not aware of all of the people who do use them and all of the things that they offer. I do believe that there has been some serious mismanagement of our public libraries in recent years, but I think that is down to local authorities, rather than the diminishing number of professional librarians.
Why not have a look at this site to see what the fuss is about?
Voices for the Library