Golden Gate Gardener refers to White Ramping Fumitory as a "Frolicsome Weed." This tricky weed looks like carrot, parsely, or cilantro when it first sprouts and could easily be confused with california poppies a little later on. Although it may be considered a wildflower in some areas it isn't native to California. In my garden it is a pest not only because it competes for water and nutrients but because it wraps around other plants like a bindweed.
Notice that the carrot seedlings are a different green and don't have the red stems that Fumaria capreolata does. Before the first true leafe comes out the seed leaves resemble chard or beet seedlings.
In some ways the sprouts are easier to pull than the mature plant. Forgoing garden gloves improves changes of getting the whole plant rather than breaking it off just above the soil.
Fumary is not a complete pest. Certain varieties have medicinal uses but as with any drug or botanical supplement it is important to make sure of dosage, side effects, toxicity and contraindications. I won't be using it but knowing that maybe I won't mind as much if I miss pulling one or two.