Yeah, it's tricky to know how to deal with that kind of request. Seems what you've done is a good solution - post in the specific regional forum that you've got a good place and then reliable handles that hit up your inbox requesting specifics can be shared with discretely. Just an idea. That's kind of what I do a lot of times and there are places that are known to read reviews and also there have been some recent reports I've seen that sites like this have been used as a basis to trigger investigations.