BERLIN (AP) — A man whose gambling addiction landed him in prison has become a social media star in Germany with an unusual campaign against sports betting at soccer stadiums. Thomas Melchior shows up at soccer games wearing the jersey of the home team’s fiercest rival — a move sure to rile the home fans — while holding a sign that says “lost a bet.”

He uses the attention to start a conversation about the dangers of sports betting, and posts video clips of the interactions on his social media accounts. The strategy can be risky — rival fans rarely mix at German soccer games and police go to great lengths to keep them apart to avoid trouble. Some of Melchior’s clips show him getting confronted by aggressive fans who insult him, throw beer at him or demand that he take off his jersey. “Yes,

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