when i first started riding it was almost always after midnight, that's when i got off work. cops would stop me a few times a week and ask me what i was doing. i don't live in a very cycling (or pedestrian) friendly city. they routinely destroy what little sidewalks we have and leave it that way for weeks during construction work, many places have worn down trails in the dirt next to major city streets. otherwise no problems, i still like to ride at night.