Yes, it is indeed possible to hide threatening information in digital communications by writing specific codes. This technique is often called steganography, which involves hiding information in other non-suspicious information, making it difficult for third parties to detect the hidden information. In digital communications, threatening information can be embedded in various formats of data, such as: 1. **Image**: Embed binary data by fine-tuning pixel values. Common tools and libraries can achieve this, such as Python's Pillow library. 2. **Audio**: Hide information in the waveform of an audio file, or store secret data by modifying sampling points. 3. **Video**: Embed data in video frames, or use redundant information in video encoding for steganography. 4. **Text**: Convey hidden information by using specific characters, spaces, line breaks and other nuances. In addition to this, there are other secret ways of transmitting information, such as encryption, encoding, and data packetization. However, it is worth noting that although these technologies can be used for legitimate and harmless purposes, in many cases they can also be abused to spread malicious information or conduct illegal activities. The laws and ethical codes of various countries have strict restrictions and supervision on such behaviors. Therefore, when using these technologies, it is important to comply with laws and regulations to ensure the legality and ethics of their use.