No it doesn't. its not someone's fault if they have a disability that means their mind doesn't function as well as in other humans. No one disparages those people for having that problem. Most of us have problems in some shape or form. However if a person doesn't have such a problem but acts like they do then they should be called out for it and the best way to do that is to label them as if they do have the problem. It should never be taken as offence to those who actually have the problem.But using the term as a put down does cause offence to people who do suffer disability and their families.