Once, I received a text from an unknown number. It simply said, 'I'm watching you through the window.' I was alone at home and my curtains were closed. I nervously peeked through the curtain but saw nothing. Then, the texts kept coming. 'You can't hide forever.' I blocked the number but the feeling of being watched lingered.
In a group chat about horror movies, a guy was typing about the 'eerie silence' in a particular scene. However, autocorrect had other plans and turned it into 'eerie since'. It completely disrupted the flow of his description. Others in the group were waiting for him to continue with the spooky details but had to wait while he corrected the autocorrect mistake. This shows how autocorrect can be a hindrance when trying to share horror - related content as it often changes important words that create the atmosphere.
There was a guy who received a text that just had a picture of his own bedroom window from the outside at night. The text said 'Soon.' He was really freaked out. As days passed, he would get more texts with pictures of him in different parts of his house that he hadn't noticed anyone taking. It was a very creepy experience.
One story is about a girl who kept getting text messages from an unknown number. The texts said 'I'm watching you sleep'. Every night, at exactly 3 am, the messages would come. She was so scared that she changed her number, but the new number started getting the same texts.
The anonymity. When you don't know who is sending those scary texts, it's really terrifying. Just like in the story where the girl got texts from an unknown number, not knowing who was behind it made it so much scarier.
There was this time when I got a text message that simply said 'You're not alone'. It came in the middle of the night. I lived alone at that time. I immediately locked all the doors and turned on all the lights. I thought it might be someone playing a cruel joke, but it still sent shivers down my spine. I didn't sleep well for days after that, constantly on edge waiting for another such message.
The sense of helplessness. You can't really stop these texts easily. Blocking the number might not work if they keep coming from new numbers. And you don't know what the sender will do next. For example, in the story of the guy whose car brakes failed after getting the texts, he didn't know how far the sender would go to harm him, and that's really terrifying.
There was a girl who started getting text messages from an unknown number. The texts described things only she should know, like what she wore the day before. The messages got scarier, saying things like 'I know where you live'. She told her parents and they went to the police. The police traced the number but it led to a burner phone. The mystery was never really solved and she always lived in fear of another message.
To write good text messages in a story, keep them short and to the point. Make them have an impact on the story. Maybe they could be a turning point or a clue. And make sure they sound natural, like something a real person would send.