The French government is simply keeping a tab on the individuals, not the electronic forum per se.
Basically they let them say a lot of racist stuff and demonstrating, but they are checking that they are not colluding for an assassination (the Jacques Chirac scare is still in the memories) and that they are are not colluding for some big destruction. And they don't want them to demonstrate too close from the presidential Palace (ie Champs Élysée is off-limit), because the proximity tends to make everybody more crazy.
One leftish guy got killed recently in a brawl, and the Government decided to dissolve the involved gang (the simple act of meeting together would be a crime now), without doing anything on the electronic or media level.
Basically they let them say a lot of racist stuff and demonstrating, but they are checking that they are not colluding for an assassination (the Jacques Chirac scare is still in the memories) and that they are are not colluding for some big destruction. And they don't want them to demonstrate too close from the presidential Palace (ie Champs Élysée is off-limit), because the proximity tends to make everybody more crazy.
One leftish guy got killed recently in a brawl, and the Government decided to dissolve the involved gang (the simple act of meeting together would be a crime now), without doing anything on the electronic or media level.