Physical assults against our politians seem to be on the increase, and our next guest has been thinking about how we protest in New Zealand. Recent incidents like the sex toy thrown at Steven Joyce, mud thrown at Gerry Brownlee, and the Prime Minister being glitter-bombed, have created debate about the nature of political protest in New Zealand. Lecturer in politics at the University of Otago, Dr Bryce Edwards, has been thinking about what these things mean.