Not sure where the all fruit thing is bad came from, but it permeates the boards.
Of course too much of anything may be bad, but some fruit will do no harm. There is this perception that fructose is the devil.
Remember, fructose uses a non insulin dependent pathway. It is stored as liver glycogen for later use(for instance at night, liver glycogen is used to prevent starvation, this is why FFA are higher in the morning).
Unless severe dieting, like contest dieting, I advocate a bit of fruit, especially anything that ends in berries...like blueberries, etc. Nutrient powerhouse.