FreeKeene.com is a website about Keene, NH. There was recently a video posted there about a law they passed banning sobriety checkpoints, and the public testimony was pretty revealing about the kinds of arrests that were made.
Most arrests were made for other things. Cops had been seen measuring cars while they were stopped to find things like depth of tread on tires, or distance from the tailpipe to the ground - any excuse to ticket drivers.
Have a look.
Thanks!