***et·i·quette ~noun 1. conventional requirements as to social behavior; proprieties of conduct as established in any class or community or for any occasion
—Synonyms 1. Etiquette, decorum, propriety imply observance of the formal requirements governing behavior in polite society. Etiquette refers to conventional forms and usages: the rules of etiquette. Decorum suggests dignity and a sense of what is becoming or appropriate for a person of good breeding: a fine sense of decorum. Propriety (usually plural) implies established conventions of morals and good taste: She never fails to observe the proprieties.***
Do not take your shoes off in public places that are not a pool or a lake or a place where you are getting a pedicure.
Especially do not take your shoes off in class.
Especially not when you were wearing huge combat boots before, when it is 80 degrees outside, and when you are wearing black wooly socks.
If you feel that your feet are too hot--if you feel the urge to take your shoes off Every Damn Day in class, and then put your feet up for all to enjoy on the chair next to you, and then you find yourself feeling comfortable enough to move away from your desk into a small group on the other side of the room and you leave your Big Stanky Boots under your original desk--you might consider flip-flops from now on.
Because flip-flops? Are acceptable.
Your current behavior is not.
I'm glad you feel all self-confident and whatever.
But there are some basic rules that need to be adhered to.
And you are breaking them.
Please stop now.