Some people have no idea what battery chemistry is in their laptops. Especially for models where the battery isn't even removable. I don't mean this as a criticism, it's just not necessarily something that everyone notices.
Are you saying there are laptops with batteries that don't fall in this dangerous category, or are you saying people don't know that all laptop batteries fall in this category?
I know people that still believe that the power for cordless drills gets transmitted from the charger to the drill via something like wifi. They're super-careful not to stand in the LOS between the drill and the charger.