By SANDY BANKSCOLUMNIST OCT. 10, 2019 5 AM When Pilar Schiavo got word that a homeless housing project might be going up near her daughter’s school, Chatsworth Park Elementary, she went on the parents’ Facebook page “to ask some questions and get the facts.” Four hours later, Schiavo logged off — still short on facts, and chastened by an online juggernaut of parents rallying to block the project. Later that week, a protest over what would be the northwest Valley’s only homeless housing…..