A rule of thumb would be to ask yourself if you would be happy to have images and information shared about you or your family/children on a public network, with or without consent.
Dylech ofyn i chi eich hun a fyddech am i rywun rannu delweddau a gwybodaeth amdanoch chi neu'ch teulu/plant ar rwydwaith cyhoeddus, gyda neu heb ganiatâd.