Hakim al-Umma Hadhrat Mawlana Ashraf ‘Ali Thanawi (may Allah have mercy on him) once said:
The sum total of good character is to avoid causing inconvenience to anyone.
The Messenger of Allah sallahu ‘alayhi wasallam forbade anyone from lifting (hiding) the stick (such as a walking stick) of his Muslim brother even if it is out of jest, for this would cause him distress.
Making people laugh at the expense of others is also prohibited due to the embarrassment and inconvenience it may cause.
Pearls of the Elders:an excellent blog. Excerpts from the biographies, sayings and writings of the ‘Ulama of Deoband