To be clear, bomb threats are 99% of the time a shit idea that you should not do, because bomb threats result in more presence of armed police and can be used to justify surveillance and repression and whatever else. So the potential harm that a bomb threat can cause for a movement almost always outweighs any potential benefits. Do not interpret this post as an endorsement of bomb threats, obviously there is a reason why the types to call in bomb threats in this country are reactionary right-wing men and not any type of legitimate left-wing cause.