CoreText iOS bug fix?

Let's get straight to the point. I sent the string of text that continuously crashes Messages (article here) to about 15 people, and a friend of mine sent it to over 50 people. A few have fixed the issue by using Reset All Settings and deleting the text thread in question, but the rest can't fix this bug aside from restoring, which some refuse to do. Will they all have to wait until iOS 7 is released?