A MUM has slammed her daughter’s ‘ridiculous’ school after the teen was suspended for four days – despite wearing ‘invisible’ earrings to hide her piercings. Rachel Dawson says her daughter Izobella Dawson, 13, ‘thought she was doing the right thing’ by wearing the barely-visible retainers, which are widely advertised as ‘disguising’ piercings. The 42-year-old says…