Typing these four characters could crash your iPhone | TechCrunch
![](https://kbin.life/media/cache/resolve/entry_thumb/4e/14/4e1493f54f4f49bef5377850f9c2cb761705c74b414b8849082a2bac91eb84e0.jpg)
There have been multiple accounts created with the sole purpose of posting advertisement posts or replies containing unsolicited advertising.
Accounts which solely post advertisements, or persistently post them may be terminated.