Yep; saw a thread a few days ago. The sloppy install disable someone's parking brakes - wiring got tangled around the mechanism so the parking brakes won't engage.
Without a sloppy install, the wiring around the OBD plug just need to be checked. These devices plug into that, and have a bypass plug so the OBD can still be used as intended. It will just be a pain looking under the dash for it.