I'm sorry but no hacker worth his shit would announce a hack days in advance like that. They would just do it. Did the image hacker announce his hack? No, he just did it. If this is real, the hacker is scaring people because altering messages is all he is capable of doing. I could be wrong, but that seems to be the case 95% of the time. There are people full of bluster, and then there are people who just do it.