Buyers have always had the duty to inspect a neighborhood and should do so during their due diligence period. It's important to know things about the neighborhood as well as inspections on the house itself.
New this year is the addition of an informational site for buyers written right into the agreement.
I wouldn't say it's very common in my market for a house to be on the dea.gov list for drug production, but it's certainly good to know a list exists. So not only can you check the property you are buying, but the street and neighborhood as well.
Agents don't disclose neighborhood information, but we certainly are the source of the source and guide you to finding all the information you need to make a good decision. I love that one more tidbit is in our contract now.