When staring in a movie like Justice League there are a ton of awesome props that I'm sure many of the actors would love to keep and take home with them. Well, Ben Affleck admits in an interview with Stephen Colbert that he stole a Batarang among other things from the set of the film.
You'd think a studio like Warner Bros. would just let it go and let the actors keep something cool from the film that they got to work with, but that isn't the case at all. After the prop department constantly called Affleck questioning him about where some of the props had gone, the studio ended up sending him a bill, and the actor says, "Turns out Baterangs aren't cheap." Affleck doesn't say, but I wonder how much they billed him for! Regardless, it's not like he can't afford it.
You can watch the interview between Affleck and Colbert below. The talk of stealing the Baterang starts at the 6:14 mark.