I have had K-band disabled for over 3yrs on one of my V1's w/o issue. I would still worry about small town local cops, though, but I speed in those areas really. On the highways, tho, I haven't seen anything but Ka or Laser in over 5yrs. I disabled K-band on our 2nd V1 about 6mo ago. It was going nuts on 101 and 280 in the Bay Area due to the new traffic speed guns.
2007 e90 335i in Montego Blue - Nov06 build
2012 X5 35d
2002 Chevy 2500HD Duramax