V for Vendetta

Vendetta (noun):
1. A feud between two families or clans that arises out of a slaying and is perpetuated by retaliatory acts of revenge; a blood feud.
2. A bitter, destructive feud.
[Italian, from Latin vindicta, revenge.]

"Remember, remember, the 5th of November

Gunpowder, treason and plot;

I know of no reason, why the gunpowder treason

Should ever be forgot."