In other cases, waiters removed plates that still had pieces of food remaining without confirming that we were truly finished.
Even some of the most renowned restaurants seem to hire staff who aren't trained to know how not to be intrusive. Here's an example from this 2005 post on the site San Francisco Gourmet:
The first less-than-stellar experience I had at The French Laundry was in January 2003. The food remained at the same magnificent level as on earlier visits, but the graceful service – described as “balletic” by some – was clearly lacking. Waiters were presenting and clearing dishes from random directions, refilling wine glasses by reaching across the front of guests, and thrusting baskets of fresh white truffles uncomfortably close to diners’ faces.
There's also the unwelcome and unrequested check-dropping of which some waiters are guilty.