Code of conduct agreements by default are fine until it tramples on natural or expressly guaranteed rights.
A university could not expressly forbid carrying/reading of a Bible or forbid the use of verbal language among peacefully gathered people which are expressly guaranteed by the 1st Amendment---as everyone would rightly raise hell over that. But with rights to self protection guaranteed by the 2nd Amendment get trampled daily.
"The grass withers, the flower fades, But the word of our God stands forever." Isaiah 40:8
"Neither the wisest constitution nor the wisest laws will secure the liberty and happiness of a people whose manners are universally corrupt.� Samuel Adams
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