I was riding tonight on a bike / pedestrian trail, and it was near dusk. I have an amber light on the front, and a red light on the back. I especially use them on my early morning road rides, but had them on this evening because it was getting dark and I was having trouble seeing some folks. I always have both flashing so that 1) I am best seen and 2) I don't waste batteries.
One guy in a big group of bikers spoke loudly, "Turn your blinker off", like I was supposed to know better. Please inform me if blinkers are bad for some reason, on some trails, in some bike positions, or what.