As anyone know (or not) if anyone send you this message on your iphone :
You iPhone will reboot or go into safe mode if it was Jailbreak !
Then of course, Jailbreak community are really active and thanks to MohammadAG developer on reddit, we are all safe !
Just install this tweak :
It simply delete this message on Lockscreen or Banners and replace it by a nice message : "Malicious text removed"
It should be seen in a few time on BigBoss repo !