Revenge ideasss?

Hey fellow teens! So my best friends bf just cheated on her and he happens to live on my street. She’s spending the night and we plan to plot some killer revenge. Any ideas? I’m looking for things ranging all the way from TPing his house, to just catfishing him. (We’ve already looked at the consequences and we don’t care if cops get involved so don’t come @ me). I would prefer something harmless but brutal.