It seems from those questions that you’ve already interacted with the owner... but do you ask these same questions when you’ve never met the owner or if it is vacant?

Call capture, QR codes, interactive augmented reality signs, text messaging options, and even links to virtual tours can be used to boost outdoor advertising performance.PPCPay-per-click (PPC) advertising can be one of the best methods of predictably and consistently driving in real estate leads on demand.

If you interacted with the "secret shoppers" legally and didn't further incriminate yourself it stands to help your cause.

In fact, if you are single or without kids, get a second job so you make more, save more and interact with your roommate less!

Does this kind of interaction pay dividends on the business side as well as on the mentoring side?

So my question is, other than that first phone interaction where you find out if they are serious, is there really any use in doing any real research and following up with these people (i.e. making a formal offer)? 

You have the opportunity to interact with countless experienced investors and acquire their counsel on any facet of real estate investing.   

I used to drive a city bus which requires constant interaction with the public.

Welcome to Biggerpockets @Ed Kahle .So far I've found it the best, no BS source for getting specific RE questions answered.Especially if you are looking for interaction and networking here, take the time to finish your profile and add a picture.

Ethics is a huge area of study, there are many areas as college and graduate level courses in different aspects, political sciences lean on social interactions and ethics, so we aren't going to come to any conclusion that can be an in depth accounting of expected behavior.But, if you act illegally you're generally acting unethical as well.