In the British Medical Journal, Sam Shuster, Emeritus Professor of Dermatology, analyses the responses he received from the general public over the course of one year when he was out riding his unicycle. Public responses to unicycling were quite different between people of different genders and ages - from openly supportive and praising to verbally and physically aggressive.
See the entire article in the BMJ 2007, vol 335 (22 December) pp. 1320 - 1322. Thanks to David Buchanan for sending this one in!