Can you really shut off anyones iPhone by sending them a simple text message? You bet you can..
Copy and paste the following message (without quotes) into a new iMessage and send it to whoever you feel like annoying! But remember, it may or not be completely be legal and it could be dangerous!
لُلُصّبُلُلصّبُررً ॣ ॣh ॣ ॣ
It will immediately restart their iPhone. Have fun, but not too much fun!