I can remember back to 1970 that this practice was in effect in New Mexico and South Texas, so it’s not a new phenomenon or a recent assault on liberty.
Being willing to assist with efforts to stem illegal immigration doesn't equate with throwing away our freedom. The federal government has authorized themselves to set up roadblocks anywhere within 150 miles of the border. That covers most of the populated areas in the country, including much of Northern New England. And the roadblocks do nothing to curb illegal immigration, but they do infringe on the rights of citizens to travel freely without delay or intimidation.
What point is there in stopping everybody on Interstate 91 south of White River Junction in Vermont? The last time I looked there were hundreds of roads and dozens of towns between that location and the Canadian border. And when is the last time you heard of Canadians sneaking through Vermont for jobs in the United States?
If you think checkpoints are really a legitimate means to enforce the law, then citizens should also be able to establish them, since we too have a right to defend the constitution and law and order. But do you really think that would pass muster with the founders?
They could get rid of illegals if they wanted to in this country. By enforcing the law in workplaces and schools, we would take care of much of the problem. We could keep them from crossing the border if we wanted to as well.
I think these stops are fishing expeditions and they are not fishing for illegals.