This post likely will be deleted for political reason, but a short study of history. I understand the idea the few travelers should be willing to give up their privacy for the good of the ag industry.
A while back Snowden released proof the government was recording phone calls and reading e-mails. In the discussions behind that "If you are doing nothing wrong, you have nothing to hide" was the stated policy of one political party. If you follow that idea, then somebody that says "No. You need a warrant to search my house/office/whatever" than any judge appointed/confirmed by that party might think "He doesn't want LEO in, must be hiding something." This could turn the "No!" into probable cause.