Only last year I stayed at a guesthouse in Kanchanaburi for three nights, on the first night, the owner saw me walking into my room without taking my trainers off, he approached me and said in a very pleasent manner that it is the rules that you must leave your shoes outside, I then told him that I do not obey rules that I do not agree with.
He was still very pleasent with me for the rest of my stay.