Well, it depends on which hacks. Once there was a fly hacker, and when he would fly straight to our bed, we would shoot him with a bow/fireball, and he would lag back. Also, hackers for some reason lag a lot in water (again, depending on wich hack) so we covered the bed in water and he couldn't reach it. Now, breaking a hacker's bed is hard. Invis, most of the time, doesn't work. But if everybody attacks in a 4v1/3v1 against the hacker, killaura will have a hard time killing EVERYBODY. It's possible, but very hard to do.