At home I get irritated if people dress poorly at nice events and restaurants, but Disney is different. I don't expect people to pack extra clothes, head back to their hotel after a sweaty park day, shower, change and head out again for dinner. We don't really do any of the signatures or nicer TS restaurants though, but I could understand a higher expectation at many of those locations (maybe not Spirit of Aloha or Hoop Dee Doo).