You have only met really boring drug dealers. I have come across plenty of them, and only the rural and disconnected suburban operations try to fly under the radar. When you're close enough to a fairly large city, the operation running that show is usually a lot more bold/brash, and their equally brazen subsidiaries will reach out into the suburbs and rural areas. This is where things start to get extremely obvious. I'm not sure if it's because inner-city police resources are allocated toward crimes other than drug dealing, or the drug dealers don't have an understanding of what will incriminate them/draw suspicion, but you definitely know when they're working the area.