I make maple syrup, and much of it has wildly different taste, the only ingredient is maple sap, but it doesn't all taste like the syrup in stores. I'm afraid when selling it I will be accused of faking it too, even though other producers will tell you that as well.
I do know someone that bought a gallon at a farmer's market that turned out to be some nasty corn syrup abomination, guy disappeared. As to fake honey, honey has a particular taste, as does maple syrup, even the stuff that's different, it's more than just sugar, just as you can't well fake fruit juice with sugar water. Mapoline is easily identifiable, I suspect honey would be the same, but I think your cases is probably more them mixing real honey with syrups and the like?
Because artificial flavors, known as natural flavors to the US government, (as they were naturally made in a lab from chemicals, after all isn't everything part of god's plan?) are a poor substitute for real ones, in my experience. Artificial strawberry, blueberry, Vanilla, mapoline, and so forth are all easily identifiable, and abominations to anyone used to the real thing.