In fact, French and Russian security services are known for their heavy touch. Fat lot of good it's doing for them.
Too bad it smells like a conspiracy theory.
Edit for source: http://www.dw.com/en/france-arrests-islamic-state-supporter-...
I believe it was LA that had a plane fly above the city and record 24/7. It was just enough resolution to make out cars and people, but not identify anyone. Less invasive than security cameras in that sense. And I don't think it was live. It was just something the police could go back to and look at after a crime as committed, and see where the criminals went or came from.
Given some conditions, like the recordings be deleted after a few days, and that it requires a warrant to look at, I think that would be ok.
Apparently this method is not working at all.
It is our duty to keep our heads cool and minds clear. When the smoke has cleared - then we will grief.
There isn't any time that would be less effective for your goals than right now.
Also, it's like 'teen abstinence' sex ed - you can tell people to refrain all you want, but they're still going to do it. People want to talk about this thing as it's happening; they will find a place to do it regardless.
But we need to do so with sensitivity, too, now.
Edit: I'll go with jacquem's reply to NewNole2001: It can wait a day or two. It can't wait weeks, though. (The Patriot Act was passed less than 7 weeks after 9/11.)
Governments kill way more people than terrorists ever will, but fear those the government tells you to fear...
An attack of this size and coordination was without a doubt electronically communicated. We can't possibly infiltrate every group of radicals with informants. And they are not going to stop.