Can anyone give us advice on visiting La Merced? We have read many books and articles that make it sound interesting and even an essential part of a visit to Mexico City. We especially enjoy visiting food markets when we travel, and our primary reason for wanting to go is to see the different fruit, vegetable, chile, and food vendors. However, we have heard some unexpected and emphatic advice to avoid it (and that from a friend who grew up in Mexico City) because it is dangerous. Can someone help us reconcile the differing opinions? We have traveled widely and typically try to remain inconspicuous. Any advice would be greatly appreciated.