IANAL and that's my point, it's not an easy question with a clear cut answer;) if you say a legal issue is clear then you better know what you're talking about

IANAL and that's my point, it's not an easy question with a clear cut answer;) if you say a legal issue is clear then you better know what you're talking about my friend, because they rarely are. If you think the article is too general, I think you have not read it. There is very practical information as to how this law works in various jurisdictions. You can also see Wikipedia for "model release". You will see contradictory information of course, because it's not a clear cut issue. But the takeaway is, if I take a video of you at a mall being weird and use it to make a viral music video on which I capitalize and which makes you uncomfortable, guess what you can (and should) sue me. Will you win? Maybe not, maybe yes, depends on how prominent your role is in the video I guess.