Dawn of the Dead (movie) as in zombies? Infecting others through saliva/bite/blood to create more zombies. o.o
What he means is,
"THIS MEANS THAT MY BROTHERS ROBBING & RAPING MIGHT ACTUALLY GET SHOT BY A GOOD GUY WITH A LEGAL GUN"
or
"THIS CANT HAPPEN! IF MY BROTHERS SEE GOOD GUYS WITH GUNS, THEY WILL RUN AWAY INSTEAD OF ATTACK! THATS NOT THE PLAN!11!"