Have you seen what a few castmembers say online? Pretty much all park guests fall into their category of being self-important, entitled, or deserving of being ridiculed. No one seems to be off limits. Have an annual pass? Ride an
ECV? Ask guestions they think are stupid? Weigh too much? Use a
DAS?
There's one person who claims to be an EPCOT GS castmember who says violent things about guests online. Customer service guidelines exist for people like him who are thankfully in the minority but still exist.
There are so many castmembers who work really hard, in very difficult circumstances to maintain professionalism and remain friendly to a lot of people who don't deserve it. When one person breaks the rules that everyone else is forced to follow, it's disrespectful to them.