Fake bombs? Who planted 38 fake bombs?
These devices were designed to look hostile. They were designed with the characteristics that people are looking for in a bomb.
They are, obviously, signs. But the features, such as exposed battery packs, exposed wiring and method of placement, play on the fact that people are looking for just such things in bombs. This was intentional.
If you play around with such things, the state is going to come after you with all the wrath it can muster. As well it should. This sort of idiocy we don't need.