It has nothing to do with being on a power trip. We follow the rules, because that's what we're PAID to do. It's part of being a professional pilot, and respecting yourself, the rules, and others. As a jumpseater, it's your responsibility to know the dress code for whatever airline you're on. Southwest may be more lax while other airlines are more strict. Just cuz it's ok to jumpseat Southwest in flip flops, doesn't make it ok on Delta. And for that matter, I highly doubt it's ok to jumpseat Southwest in flip flops. I'd almost guarantee their FOM requires business casual attire. To put the Captain of that flight in a position to have to decide whether to kick you off because of your attire is unfair and unprofessional.