Sometimes sending a message is part of the point. And you still have plausible deniability anyway "it was a false flag booo". The Russians do this a lot. This

Sometimes sending a message is part of the point. And you still have plausible deniability anyway "it was a false flag booo". The Russians do this a lot. This kind of attack that they want everyone to know they are being without telling you they are behind it and denying it in all colours.