After Paris, everyone will be so wound up that the terrorists can screw with folks w/o having actual plans because any hint needs to be taken seriously.
Then, when folks get tired of stamping on "potential fires", the guard will go down and a real attack will ensue - rinse and repeat at will.
Unless a bunch of us (nations - not individuals) take Russia's approach and start killing massive numbers of them on a daily basis, we will continue to dance to their string-pullers.
Look at how many resources are wasted and how much venom is spewed at “straight white males” when a homosexual, black person, or muslim claims stages a phony hate crime. The accused group is vilified and there never is any blowback or apology when the hoaxer is exposed.