When Gary Crutchley started taking pictures of his children playing on an inflatable slide he thought they would be happy reminders of a family day out.
But the innocent snaps of seven-year-old Cory, and Miles, five, led to him being called a pervert.
The woman running the slide at Wolverhampton Show asked him what he was doing and other families waiting in the queue demanded that he stop.
One even accused him of photographing youngsters to put the pictures on the internet.
Mr Crutchley, 39, who had taken pictures only of his own children, was so enraged that he found two policemen who confirmed he had done nothing wrong.
'It is very sad when every man with a camera enjoying a Sunday afternoon out in the park with his children is automatically assumed to be a pervert.