If someone shows up in your broadcast list does that mean you have sent them a message? I was looking up a friend in my address book when I noticed that an old colleague had gone onto WhatsApp. I went in to write a hello message, got distracted and am now worried that I sent a totally random and blank message and I look like an idiot! It doesn't look like I sent anything from my end but they are on my broadcast list. What has happened pls?