It's not a matter of taking crap; normally Klaus doesn't care what the crew does so long as the ship runs well, and there's no 'accidents' involving taking potshots at the servitors, because those things can get expensive to replace. However, he does hold some things above reproach, regardless of who's more powerful or more temperamental, and one of those things happens to boil down to 'you don't bring a six-barrel gatling longer than your arm to the dinner table, unless you expect to get razzed for your insecurity regarding your genitals, or lack therof.'<br/><br/>Otherwise, he's a perfectly reasonable man, who is quite nice when one sits down and talks with him.