The sole hukam of Guru Gobind Singh Maharaj was that we all take Khande Da Phaul and become tyar bar tyar not just keep Singh and Kaur as names. I think promoting just an adoption of the singh/kaur as a surname will be interpretted by some as an easy option of being a sikh. Just like wearing a kara does not fastrack anyone to Sikhi, the same applies to just keeping Singh or Kaur in your name.
Waheguru Ji Ka Khalsa Waheguru Ji Ki Fateh
Bhai Sahib ji i think you misunderstood what i meant, i didnt mean only accepting the title of singh and kaur obviously we should try to follow everything the Guru sahibs have told us, keeping surnames of singh or kaur helps us in so many ways such as hiding the filthy castes associated with them, accepting that we belong to the family of Guru Gobind Singh. The Surnames people keep have not been given to us by the Guru sahibs so why attach ourselves to them?
Gurfateh Ji