A good article here. The neighbors called the police 2 months after the dealers moved in.
Interesting. I guess the individual comings and goings of drug deals would be what I expected. Without those, it might be hard to believe it...especially on that scale. It might be easy to pass it off as someone with a booming eBay business. I asked my wife if we'd notice. She said probably not unless it was within a several houses up or down the street. Then, we might see red flags.