Unless someone is extremely metabolically deranged, it would take tremendous amounts of salad vegetables to effect ketosis. Red bell peppers have the same carbs as kale. Non starch veggies, especially when raw, are hard to over consume because they are low calorie and high in fiber. According to Dr. Berg, they help fix fatty liver. Many low carb gurus emphasize the importance of consuming vegetables in a LC diet.
Some people think if low carbs is good, no carbs is even better. From my experience, the effect of that small variations (ie. 30g vs 60g) in carbs have on my glucose and ketone levels is trivial compared to other factors (stress, exercise, sleep) that influence it on any given day.
I don’t believe in guessing about things that can be easily tested. How your body responds to various inputs can be tested with a glucometer. For example, test BG then eat a 500 calorie carb and fat meal consisting of a vegetable only salad with a fatty dressing and test BG an hour later. Compare this to a 500 calorie protein and fat meal consisting of meat only.