The main factor is in person centered approach to count and treat everyone as an individual with respect. Treating every individual with dignity, make informed choices, respecting every individual's views, encouraging and supporting in active participation, helping individual service user and all worker (regardless position) to make complaint and comments and maintaining confidentiality. All of the above practices can help individuals to gain their self-esteem and recognize their values, rights and powers what protect them from being abused.
Note (My research) : '' Over empowered vulnerable people can abuse care workers or surrounding others ''.