about drinking. {41} On a cautionary note, however, our grant of slight latitude in this particular case should not be read as allowing broad officer discretion in questioning motorists or deviating from a supervisory plan or script. Close questions as to when the threshold of minimal discretion at DWI roadblocks is reached should be resolved in favor of privacy, not a broadening of discretion. Supervisors and field officers must exercise prudence and caution in DWI roadblock investigations. We neither fall on the side of a bright-line approach by which any deviation from a plan or script will render the roadblock unreasonable, nor on the side of incremental intrusion into privacy by deviating field officers. Compare Commonwealth v. Anderson, 406 Mass. 343, 547 N.E.2d 1134, 1138 (1989) (<HOLDING>), with Brouhard v. Lee, 125 F.3d 656, 660 (8th
holding mere deviation unconstitutional holding that the mere application for other benefits is not fault holding mere rumors inadmissible holding that mere expectancy is not property holding political discharges were unconstitutional