The problem is that you are not limiting a picture to a particular group, you are leaving it open for the masses to read.
Let's say you are a landlord and want to discuss specific tenant issues. If your picture is up, then people in your local community will quickly be able to determine who it is you are discussing. What then? If pictures were required the level of candor and openness would be restricted. I would have to hedge my advice and discussion of particular experiences, I would also have to limit what I said because those that know my specific businesses could reverse engineer the type of advice I give.
Do you want to know how we bid against the FBI on a home at TTEE sale and about how I walked away when my partner kept the home to film adult movies? If my picture and name were open to every random Google searcher and facial recognition software out there - I would probably not be that honest.
There is an unlimited amount of information that would not be shared if everyone had their full profile up.
Some of you have said some pretty rough and bad things about tenants, do you want that tenant to find your posts with a simple Google search and then bring itto the judge and say - "See what he is saying about me" - even if you did not mention names.
Do I want random people to know how many homes I can buy for cash?
Do I want everyone to know how much money I made on my last flip? Without pictures and with usernames, we can be open.
Go ahead, be honest about how many homes you have etc, post your picture, do you not think you might be bringing the wrong attention to yourself?
Privacy, Privacy, Privacy. This is why I am not on Facebook, LinkedIn, or other sites. My clients and partners do not need to find me on the internet.
I could go on and on about this, as I have already, but in the end, you will be limited the free flow of communication.