[QUOTE=anthony_lynch15;17784162]They haven't actually had to destroy a world themselves yet.
Didn't they detonate that first antimatter bomb on the doorstep of Latveria? Black Panther has that line about remembering who he used to be, then BOOM! And Doom is like "Yo, you guys are packing some serious heat...thanks, now get off my lawn."
Also, regarding Beast, the Illuminati shadiness is often referenced, but what is often overlooked is that little bit at the end of Warren Ellis' Ghost Box storyline where he has Agent Brand pour the Peak's superlaser through the ghost box, completely destroying the entire planet on the other side. It's been hinted that maybe it wasn't totally destroyed, but at the time he didn't know that and willingly made the decision to destroy an entire planet to save his own....he feels so bad, he has to be consoled by Cyclops.