A senior member of Hong Kong’s police watchdog said on Thursday that elite anti-riot officers should not be required to show their identification numbers, to avoid their family members’ personal data being exposed.But Christopher Cheung Wah-fung, vice-chairman of the Independent Police Complaints Council (IPCC), later walked back his comments in the face of criticism, saying people should take their concerns to the force.On a radio programme on Thursday morning, Cheung was asked whether members…