Never been ticketed while biking, but I've had a few strange encounters. In Vienna, Austria, on a morning with extremely light fog (only a few cars had their lights on), a cop yelled at me while I was pedaling, "Wo ist dein licht?" (Where is your light?). It struck me as absurd, plus he was using the familiar form of "you" (I was 25 years old at the time). I started to laugh and didn't even stop pedaling, which astonished him. That had been proceeded by a Viennese cop yelling at me when I was walking my bike on the sidewalk on a street with one-way traffic going the other way. That made absolutely no sense to me. Could that possibly be illegal in Austria? I didn't argue with either one, but neither encounter made much sense to me. At least the fog-obsessed cop was arguably looking out for my safety, but as I said, the fog was extremely light and few cars were using their lights.