A short list of people not to taunt: your big brother, cops, nightclub bouncers, dragons. Taunts are insulting comments, and, unless you are a really, really fast runner, keep them to yourself.
Taunting is often associated with large groups picking on an individual. A mob might call out a hated king from his castle with taunts and jeers. Taunting the weak is a high-school phenomenon that teachers, administrators, parents, and students are working together to stop.