Get this all the time. 300 open parking spots, at least 12 on either side of me, and still someone parks right beside me. Don't often get damaged, but I do shake my head.
Within the first week of having my Cutlass on the road after it was painted, someone bumped the back bumper and cracked a bunch of paint by the license plate pocket. Had it parked right across the road from work, directly in sight from my desk, but still didn't see it happen.
Same thing happened to my Uncle, just days after his 68 El Camino went on the road after a complete resto, he was parked far away from anyone else. By the time he came out, had a baaad door ding from something high, suv or truck, but no vehicle in sight. He was only in the store for 10 minutes, so whoever did it knew what they did and took off.