Whatever. There's been more than one time where I was coming home from work at night and after the commute found a DUI checkpoint stationed on the main road rig

Whatever. There's been more than one time where I was coming home from work at night and after the commute found a DUI checkpoint stationed on the main road right in front of my street. No way I was going to sit through the bullshit waiting just to "prove my innocence" as you seem to imply we all should. Just like if it were a major, road-blocking accident, the answer for me (and I'm sure many people who were not sober) was U-turn and reroute. There's no reason why law abiding citizens should have to be inconvenienced by these dubiously effective law enforcement efforts, and if there's a tool based on protected free speech that allows us to avoid them, so much the better. LE can catch drunks in other more effective ways that don't inconvenience the law abiding citizenry.