This is probably one of the worst things I've heard. To privately contact your competitor's customers to slag off their work is the lowest of the low. Anybody who does that would have to be a first grade arse-wipe, actually far worse. I almost can't believe that, and don't really want to believe that that sort of crap happens. If that goes on that really is disgusting and shocking to hear.but privately are quick to contact your customers behind your back and speak negatively about you.