Throughout the passage, there is a sharp contrast drawn between ----.

Non-lethal weapons are typically given names that
make them sound acceptable; for example, the
term "rubber bullet" was adopted to suggest
something soft and harmless. Jelly batons, sponge
grenades and bean bags sound like something
from a children's party, and you need to be aware
that these "bean bags" are canvas bags of lead
shot. Similarly, the very term "stink bombs"makes
them sound like a practical joke instead of a
chemical warfare agent.Sometimes language is
deliberately used to mislead, as in the case of
"rubber-coated bullets". These are steel balls the
size of marbles with a thin rubber coat, able to
penetrate the skull. There are also so-called "plastic
bullets", which are high velocity bul lets made of
PVC.