The fact is that the greyhat could intrude, which means anyone else could intrude. If you didn't want him there you should have patched your damn router. There

The fact is that the greyhat could intrude, which means anyone else could intrude. If you didn't want him there you should have patched your damn router. There is no point in being outraged because you have already been owned, and the grey did you a favor. Now, there's no need to thank them, but being mad is totally counterproductive. Learn the lesson, patch your router.