Forvgive me for butting in, but I fail to see where they are "ripping off" AC/DC. I mean, unless they are releasing albums with AC/DC songs on them.
The influence is obvious, but who isn't influenced a great deal by what you listen to? I mean, I'd be hard pressed to write a song right now that didn't reflect some of my own personal influences. If you don't like them because they sound too much like AC/DC, than that's one thing. But to say they are "ripping them off" is quite ridiculous.
Regardless, bring it on. If they are "ripping off" AC/DC, than it might actually be worth listening to for once!