Non-violently, because they're just characters in a ****ing video game.
No yelling at random Burger King employees. Just pull up through the drive thru and go "AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH"
".... welcome to Burger King, how can we he-"
"AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH"
"... erm... are you ok?"
"AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH"
"Are you alright?"
"NO I'M NOT ALRIGHT! SAKURAI ADDED A CHARACTER I DON'T LIKE! AHHHHHHHHHHHH I'M SO MAD AHHHHHHHHHHHHHHHHHHHHHH"
"... ookaaaaaay? We can't help you with that, can we get you a Whopper?"
"NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO! GET ME SAKURAI'S HEAAAAAAAAAAD! AHHHHHHHHHHHHHH"
Then some old guy in a baseball cap gets out of his car from behind and goes "Can you quit yer belly-achin? I want my Whopper..." and then you just EXPLODE "YOU'RE NEXT, OLD MAAAAAAAAAAAAAAN!" and a fight takes place
Something like that? TOTALLY reasonable response.