This nonsense over porn at the library has been going on as long as I can remember.  I remember the controversies over Playboy.  Or even if medical books should be available as they might get looked at by children.  There has been the same fanatics trying to set the standards for what books should be allowed based on a criteria they alone set.  
I see no issue with having a children's section separated from adults.  But I'm  willing to have to have the librarian be able to monitor ever place on the web I go. For I have no doubt that 10 different librarians would each have different values as to what is or is not approved web sites.