.... 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?
Well fact number one. She didn't scare the hell out of that multitude.
Second, she didn't act in any way to try to scare that multitude (running around screaming "I have a bomb," "Bang and you are all dead," or any such thing).
So absent some demonstrative fact that she did so intend (a fundamental requirement, still of American jurisprudence), I think we have to conclude that she didn't so. Simple allegation of such an intent, absent a demonstrative fact, is insufficient to carry this charge.
You need two components to carry out your scheme. 1. Flashing lights. 2. A bomb.
There was no bomb.
We have flashing lights without bombs all over the place in the US. We should lock the place down, I suppose.