Lol, my ass. Zak would go like, "omfg I attack you!" and then they'd shoot him. Now Zak is fast, but he can't dodge bullets. Not several. This is not James Bond, remember? :P
And of course Dieter would like Artemis' boots. And when they're done, he'd make sure Artemis gets shot. I can't risk that. Stfu. :P