What's the most annoying way people use WhatsApp to send messages that are overly casual or informal?

One of the most annoying ways people can be overly casual or informal on WhatsApp is by using excessive abbreviations, slang, or emojis in a way that makes the message unclear or difficult to understand. For example, using too many acronyms like "LOL" or "BRB" can be confusing, especially if the recipient is not familiar with them. Similarly, sending messages filled with emojis that don't add much to the meaning can make it hard to grasp the actual intent or content of the message. It's important to strike a balance between casual and clear communication to ensure your message is both friendly and comprehensible.