How exactly can I get my university to change a rule in advance of its creation?

Thanks to a particular security guard, there is now going to be a campus wide dress code requiring shoes indoors. His exact statement was “Well i’ll have the dress code posted tomorrow and you won’t be allowed in here anymore.” There is no law against bare feet in the health code in ohio and if necessary I can make a claim of cultural discrimination… I think. I explained to him that it was a cultural thing, and he didn’t care.
Could I sign some kind of contract saying that if I get hurt because i’m not wearing shoes I won’t sue and then they can take down their stupid sign?