US border officials may soon be granted the authority to review visitors' social media activity from the past five years, following a proposal announced by Donald Trump. The plan, which is not yet ratified, aims to prevent individuals deemed undesirable from entering the country. Travelers applying for entry may be required to disclose their social media accounts, as well as provide additional personal information such as phone numbers and family details. While the proposal could take effect as early as February, legal challenges may delay its implementation. Experts question the practicality of thoroughly examining years of online activity, suggesting that only targeted searches or automated systems could make such checks feasible.