Season the duck legs generously with salt and pepper.
Place the duck in a wide pot with water halfway up the sides. Bring to a gentle simmer, cover, and cook 40 to 45 minutes, until tender and much of the fat has rendered.
Remove the duck and pat very dry. Let rest uncovered 10 minutes.
Heat the olive oil, add garlic, cook 30 seconds. Stir in the chili paste, vinegar, and honey. Simmer 2 minutes, then season with salt.
Heat the frying oil in a deep, heavy pot to 375°F (190°C).
Carefully fry the duck legs, in batches if needed, for 8 to 10 minutes, until deeply golden and crackling.
Remove the duck to a wire rack to drain.
Drizzle the Calabrian chili sauce over the duck and finish with fresh parsley.