What happens when every car uses lidar, or some other range finding technology? Won't they interfere with each other and cause problems?

I did similar in 1990. We had a Novell network and I simulated the text based login screen in a programming language called unicomal, and left dozens of terminals with it running logged into my user account. The network admin was convinced to log in under the pretext that I'd lost my password, and hey presto, one admin password grabbed, written to my user directory and an appropriate 'wrong password' message printed before logging out of my user account, leaving the admin thinking he'd simply typed it incorrectly. Ha! Those were the days.