Luke Littler has warned fans to be careful of scammers selling fake signed goods online. The 17-year-old has enjoyed a stunning rise to fame over the past few months, ever since shining at the World Darts Championship. Littler is set for a big future in the sport as a result, with the teenager also currently playing in the Premier League. Yet while fame can be a good thing, it can also carry plenty of negatives as well. Littler believes some scammers have attempted to flog fake signed goods as a result of his stunning performances. And the darts star wants his fans to be careful with what they…