I once got pulled over because I was using autopilot. And I was stone cold sober. Damn thing just couldn't figure out how to do easy corners on I-5 without ping-ponging. Turns out there was a cop behind me.
Fortunately it was resolved quickly with chuckles all around.
DUI checkpoints are set up to only catch the stupidest of criminals. At least in my neck of the woods, they publish the locations of the checkpoints in advance, and are always on arterial roads, but never state highways or interstates. It's entirely possible to avoid the checkpoints altogether. If you're stupid enough to get wrapped up in one of those, you probably shouldn't be drinking or driving.