I’m wondering about how open we are here to discussing behavior that might theoretically violate the terms of service of one or more social media platforms. Would this be against site rules? I’d not, would ir be a bad idea anyway? I’m not saying I’ve ever done anything like this, but someone keeps adding photos to my collection which have not been made available to the general public, but rather to members of groups for people fitting a certain demographic profile which differs from my own real life one. I’d be interested in general discussion regarding tips and tricks, would be open to sharing what I’ve learned as well. If this is against site policy or is just generally deemed to be a bad idea, there’ll be no more from me regarding this. I have no intention of stepping out of line here.

It's all totally above-board. When a person puts something on the internet, there is always - ALWAYS - a chance that someone else will get it and share it. If you want to post the content here, go for it. There are just two considerations:

1. Regardless of what I just said, the person sharing that content did so in confidence. Their desire was that only the people in that private group see the content, otherwise they would have posted it publicly or tweeted it or something. They're a human being and they will almost certainly feel violated by your actions... if they ever find out what's happened.
   
2. Depending on how many people are in the group, you may risk outing yourself. This probably doesn't matter because, "oh no, my fake account got banned," but it's something to keep in mind.
   

Thank you for your input. I will consider what you’ve said, more to come.