Regarding being seen - even if you are lit up like a christmas tree, you should assume no-one can see you, and have an escape plan.

Also, a major gripe I've got in the past couple of years is cyclist with super-bright, epilepsy-inducing flashing lights (which are great for on-road use) who ride with said lights at full-blast on off-road shared (pedestrian+bicycle) paths, thus blinding any oncoming cyclists or pedestrians. Car headlines have regulations to prevent them blinding oncoming traffic, but bicycles do not, and the lights have gotten _much_ cheaper and brighter in the past few years. Pity that consideration of other people isn't such a thing...