In Nero 188.8.131.52 i could disable burnproof both in the actual burn dialog (Where you choose speed and writing mode before you actually burn) and under Recorder->Choose Recorder->Options. Now it is activated and greyed out in both places. I can en/dis-able Smart-burn but not Bufferunderrun Protection.
I realized that this is not such big an issue with the new 48x burner since it is CAV and shouldnt make any "gearshifting links" like the old Z-CLV 24102B. So Burnproof shouldnt be used unless the HDD isnt fast enough. However I do like to be able to decide which options i use and which not on my own.