As you all know, I lost a dear family friend a couple of weeks ago. Her widower, Jim, has, understandably, being struggling to cope with her death. He's 81 and, due to a brain haemorrhage nearly 20 years ago, has memory problems and is easily confused. A couple of days ago, some guys in a van turned up at his door and asked him if he knew there was a slate loose on his roof. They explained that, if it wasn't repaired, it would lead to all sorts of problems in the future. (The roof had been done professionally by a reputable company the previous year and was in perfect condition. Jim didn't remember this). He agreed to let them fix it and they charged him £500---which he paid. I'm led to believe that these guys scan the obituaries and seek out vulnerable people. Jim is one of the nicest guys you could ever hope to meet.
Adding anything to this is pointless.