>> "While users have got past similar Snapchat restrictions by simply taking screenshots of sent messages, Bleep offers some protection against this tactic: when reading messages from a contact, their username is blocked out. If you want to see who you're talking to, you'll need to press an eye icon that in turn blurs the entire message history, ensuring that users can't be easily tied to potentially incriminating screenshots."
Pretty smart way of getting around the screenshot issue.