Earth to jim35 - it wasn't a fake bomb.
Does a shoe look like a bomb?
Did her ensemble, including the modeling clay, look like anything else? Anything at all? Art?
What is a circuit board with battery and wires, and flashing lights, attached to a black hoodie, combined with a handful of modeling clay, supposed to be seen as?
You have no common sense, but what you lack in sense you make up for in arrogance and criticism.
.... it wasn't a fake bomb.
How do you know she didn't intend to scare the hell out of that multitude of ignorant people; kids, little old ladies, untrained security people, and in your opinion, the vast majority of IQ-less people who all believe the movies that portray bombs as being lit up with blinking lights, and who don't know, as you do, what all bombs do look like.
And when are you going to educate, by sharing that knowledge with us, the great unwashed, gullible peasants, some of who just might believe that it is posssible for an explodable bomb to have flashing lights on it if the maker, for some unfathomable reason, so desires.
Or are you also claiming that that is simply impossible?