In general, I am in favor of using appropriate words and not dumbing things down to a 4th grade reading level. Treat people like humans, not like idiots. I'm not sure I would use bus stop signs in this way though. I saw this metrobus stop by the Discovery Channel building in Silver Spring, MD. I have to admit, I wasn't 100% sure if alighting meant getting on or getting off, and that is a critical distinction in this case. I'm sure I would have figured it out the first time a bus passed me by.
The larger question is what would be a better word or phrase? It has to be short, unambiguous, accurate, and (at least mostly) correct english. "Getting off only" would be humourous, "This stop is for people to get off the bus and not for picking up people" is a bit long. Maybe "Dropoff only" or "No pickups"?
[where: Silver Spring, MD]