Facebook groups have a serious misinformation problem, according to a new report from a leading fact-checking site – and the hundreds of hoax posts it discovered about escaped snakes and serial killers probably only hint at the scale of the global problem. The report from Full Fact (via The Guardian), which is an independent, fact-checking charity in the UK, has gathered data and examples picked up over the past year during its studies of online misinformation. Overall, Full Fact found 1,200 examples of hoax posts in Facebook groups during the last 12 months, which it says is likely to be “the tip of the iceberg”. The charity says that judging the true scale of the problem is difficult, because “many hoax posts are never fact checked or reported”. But it found that at least 115 different communities across the UK have been the victim of hoaxes, and that these posts have also appeared in many groups overseas, too. […]