in winter we spend more time driving in the dark than we do in summer, environmental conditions probably affect the longevity of bulbs too so it would make sense that you are noticing more people driving with incorrect lighting on their vehicle
Lights are only what you can see,. I am on a daily basis on what I see come into the place i work and we are a small village family garage the worst and most frequent. child seat held in with a ratchet strap