So, what does this thread try to demonstrate practically speaking (this is what interests most of us here)?
Well, this is a photography forum in which many, if not most, members are engaged in the practice of street photography, and this is a thread about legislation regarding street photography in France, but also in different countries. Since many people don't know these laws, often even in their own country, you'd figure the interest is pretty obvious, even if just out of curiosity.
The question of privacy law, or right of image, is also (if not mostly) of interest because it brings up ethical questions, i.e., going, for example, from "Am I allowed to photograph these people/kids I don't know" to "
Should I photograph these people/kids I don't know".
Talking about the legal aspect is an important reminder that these laws exist to protect these people's rights. And a reminder to some photographers that it may be important, once in a while, to ask oneself why that should be the case, why that should matter.
So there is nothing to demonstrate, practically speaking, as is always the case when ethical matters are involved — a recent, similar thread about photographing (or not) the homeless has proven this.
There are many photographers, here and elsewhere, who neither care about legal matters and, strangely enough, even less about ethical matters. They are free to ignore this thread (and similar ones) if they see no interest in it.