Public interest after all?

A rip roaring attack on Heydon Prowse who secretly filmed Alan Duncan on the House of Common's terrace by the Independent's Stephen Glover.

He describes him as not a journalist but a self-styled campaigner who posts clips on YouTube

He asks whether

Prowse had delivered such a public service after all. I started to wonder whether his secret filming was really in the public interest. Was it possible he had abused an important trust that must exist between journalists and politicians in a democratic society? Might it be that his underhand techniques, if repeated on a wider scale, would paradoxically have the effect of making politicians less prepared to speak frankly to journalists, and even, in the long-run, less accountable?