I can confirm. I manage to upgrade my badges using the -1 point. Though I have a feeling it will be one of the exploits 2K will quietly patch.
[Edited by aliceandcat, 10/12/2014 4:36:26 AM]
I did this in the 1st quarter and added 10 points after scoring 10. Continued playing and scoring but at the end of the 4th quarter the game said I lost 55-56. (72-56, before finial whistle)Everything else works without issue though
[Edited by debo22t, 10/12/2014 2:33:37 PM]