As you are aware, we all have to work in the same office that anyone walking on the carpet with such filthy shoes, then simple question is would you do this at home and what would your mother and father say? Surely they would be disgusted by such dirt being brought home, that this is not your home, yet its quite a nice office that Khun Paul ensures we have the office looking good and clean. Wearing such dirty shoes is not other than stupidity and downright disrespectful behaviour.