My problem is that what is offensive and what is acceptable keep changing. For example, 'cripple' was replaced by 'handicapped', and then by 'disabled', and now some insist on saying 'differently abled' - soon it will be something else, and earlier versions that used to be widespread and considered correct will be considered insulting or offensive.
Or the 'offensive' terms may reappear as acceptable. Black people can now refer to themselves as niggers, but if you are not black it is frowned on or roundly condemned.