SPRINGFIELD — A lawmaker running for Chicago mayor filed a bill that would prevent parents from shaming their children on social media, but opponents pegged the bill as both “vague” and “too harsh.”House Bill 193 — filed by Democratic Rep. LaShawn K. Ford — would create a petty offense punishable by a fine for what the legislation calls “parental cyberbullying.”The legislation states that a parent or legal guardian of a child could be charged with an legal offense when …