The Bacchae is full of gruesomeness and violence. You've got both animals and people being ripped apart. Not to mention a mother parading around with the ghastly, severed head of her own son. When watching the play we are forced to ask ourselves tough questions about violence. What is the difference between murdering and hunting? What is the meaning of blood ritual and sacrifice?
Pentheus's dismemberment is a human sacrifice.
The Bacchae blurs the lines between murder, blood sacrifice, and killing for the purposes of hunting.