Make it a legal requirement when opening a new social media account, to provide a verified form of ID. Where the account belongs to a person under the age of 18 verify the account with the ID of a parent/guardian, to prevent anonymised harmful activity, providing traceability if an offence occurs.
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Many people including myself have become a victim of online trolling, or having their social media accounts cloned by people stealing photographs and pretending to be the same person under another name. This makes people feel vulnerable especially when photographs of children are involved too.