So you are basically saying the family of that old lady who was terrorised by Heather Frost and her brood in the final years of her life just made the entire thing up including her diary entries?
Why would that be so far fetched? In fact, it is entirely possible the son, who "released" the diaries could have made it all up. The point being, it could be that some of the neighbours are a bunch of bullies and are jealous of the attention she has been getting. The very fact that it is in the Daily Heil is enough to lay that level of suspicion.