Father criticized as being a pervert for photographing his own children on a slide

Sometimes paranoia can take a form that baffles people. Consider the normal scenario where a family goes out for a fun filled day where a loving father takes photographs of his children on a slide - 2 fun boys who are 5 and 7 years old. And when people see him taking these photos, they object, with some claiming that he is a pervert who is taking photos for selling on the internet, with the unstated claim being that he was involved in child pornography. Other parents objected, the person running the slide objected; this made the person so angry that he found policeman to back him on his right to take these photos - but this effectively ruined his day (link to article):

Yesterday he said: ‘What is the world coming to when anybody seen with a camera is assumed to be doing things that they should not? ‘This parental paranoia is getting completely out of hand. I was so shocked. One of the police officers told me that it was just the way society is these days. He agreed with me that it was madness.’
He said: ‘The children wanted to go on an inflatable slide and I started taking photos of them having a good time. Moments later the woman running the slide told me to stop.
‘When I asked why, she told me I could not take pictures of other people’s children. I explained I was only interested in taking photos of my own children and pointed out that this was taking place in a public park.