Should Dress Codes be Mandated for Teachers?

Depends what kind of society you wish to create. At The Borough of Manhattan Community College when I taught in 2001-3003 we were not allowed to even wear jeans--so everything else was taboo, the policy was set before I arrived, and I was told "they wanted to clearly distinguish between the students and faculty." (There must have been an isssue that precipitated this,since the school is located in the trendy TriBEca section of Manhattan, near the Village. Very good question.

I think it depends in part on what the age of the children being taught. All of the things you named can be distracting and how distracting it is may depend on the age of the child.

Just as an example, a female teacher in middle school and high school wearing a short, tight skirt or a low-cut blouse to class could elicit undesirable responses from students and parents. And in the case where a teacher ends up becoming s*xual with the student, whatever the reaction-- positive or negative-- it's undesirable. I don't think preschool and elementary school CHILDREN notice the clothes as much as things like tattoos and body piercing because those things can be scary. However, the parents, who are more prevalent at elementary schools because they usually have to pick their children up and go to parent/teacher conferences more regularly are more likely to notice and take issue with a teacher's style of dress or body markings.

It's a good question though. Every job I've worked has had a dress code so I'm not opposed to teachers being held to a certain (higher) standard of decorum.

Blessings...