NO TRAILER LIGHTS

I can not understand why people towing trailers, which are too wide/tall, whereby following vehicles are unable to see the vehicles Brake/Taillights. It seems that the cargo on the trailer is typically an OffRoad vehicle [a Quad]. Perhaps the driver of the vehicle has spent so much money on their 'toy', that they didn't have enough to buy a trailer equipped with working safety equipment [lights].  Or perhaps will tearing across areas they shouldn't be traveling in, they hit something hard enough to fly over the handlebars, and land on their head causing enough damage they are unable to remember to plug in the umbilical cable from the vehicle to the trailer !!!