There's been some comment about why those protesting against the National Front on Saturday were hiding their faces. The answer is RedWatch - a neo-Nazi website established to "build a catalogue of information and pictures of the Left". This includes names, addresses, phone numbers, and pictures of where people live. While there is the odd disclaimer, the purpose of the site is clearly to encourage violence against those listed. For example, a collection of pictures on the recent Peace Action protest against the weapons conference at Te Papa exhorted readers to
Remember these faces for they are anti-New Zealand and anti-White. These people are your enemy.
In the UK, a similar site has led to a series of violent attacks on journalists, protestors, and others who speak out against racism. These have included stabbings, beatings, and fire-bombings. RedWatch New Zealand is explicitly modelled on this site, and its clear intent is to provoke at least the fear of similar attacks by nazi thugs here. Against this background, I can't really blame anyone for taking precautions.