Well no, it isn't a lie. The definition (from Everytown for Gun Safety) of a school shooting is out in the open. Yes, it is very broad but it is what it is. A "school shooting" is different than a "mass shooting." Even the definition of a mass shooting isn't what everyone thinks it is. This is why it helps to use a search engine and books to learn things.. rather than parrot stats you've heard on the news and on social media. :) Broad definition or not, much the outrage comes from the fact that guns have been in and around schools and have been discharged. Luckily in many of those situations the bullets didn't hit anyone.