Libby Maurer says she should have known better. A scammer tricked the 82-year-old woman into believing that her grandson was in jail and needed $8,000 in bail money. It was the perfect “grandma scam.” In this ruse, hucksters play on emotion by impersonating a grandchild or another loved one, with claims that they’re in jail or were in an accident and they need money. Sometimes the call comes from someone pretending to be law enforcement or a doctor, sharing details of the grandchild’s misfortunes to explain why they need the cash. There were 7,276 so-called imposter scams reported by New Jerse…