I have been riding mountain and road bikes for my entire life, but I really love riding road bikes. I have a nice geared road bike and a fixed gear. For people who really enjoy bikes and have been riding them for a long time, fixed gears are not very hard to ride at all. They are much more responsive and give the rider more control over the bike, in addition to a much better work out. Also, having no gears or brakes on your bike makes it much lighter, easier to maintain (adjusting gears is bitch and if your tire becomes lees than true it won't rub against the break), and there is just something about the quietness and simplicity of riding a road bike with only one gear. If you are not riding a fixed gear in a dangerous manner and are anticipating things ahead of you, slowing down for intersections and not bombing down enormously big hills, fixed gears are not all that dangerous, but if you ride it like a regular geared bike the chances of getting wrecked are much higher. Riding my fixed gear has helped me with my back problems and has been a lot of fun. It is kind of unfair to knock them if you don’t bike and especially if you haven’t ridden one.