Bring a large, deep skillet of water to a boil. Reduce to a simmer; add the white vinegar. Fill a saucepan with warm water; set aside. Break an egg into a small bowl; holding the bowl just over the vinegar water, gently slide the egg into the water. Repeat with the remaining eggs. Poach about 2 minutes (longer for firm yolks). Use a slotted spoon to transfer the eggs to the pan of warm water.
Place the frisée in a large bowl; set aside. Cook the bacon, stirring occasionally, in a medium sauté pan over medium-high heat until golden brown, about 3 minutes. Add the shallot; cook 1 minute. Add the red-wine vinegar; bring to a boil, swirling to combine. Pour over the frisée. Season with salt and pepper; toss to coat evenly.
Divide among 4 plates. Drain the eggs, and top each salad with one. Sprinkle the eggs with salt and pepper. Serve immediately.
