I worked for a big corporate overlord for a long time, and for some reason every 3 years or so our cubicle walls got shorter. They started out at 6 feet high, which was great and quiet and semi-private. They got short enough so if you sat up straight and leaned forward, you could barely peak over... which was a little distracting.
The breaking point was when they got lower than the average person's stupid mouth. Then EVERY phone call was basically broadcast across the entire warehouse of an office complex. Seriously, god help you if you are within shouting distance of sales, because you are never ever ever going to get any work done.
As a final insult they shrunk our desks from U shape to L shape, then lowered the cube walls to desk height... so if something rolled off your desk, it could roll down the hall too. It was insanely stupid...
Eventually they just sent all the tech people to work from home... since they had sabotaged our work so much at the office, we might as well take the initial hit on telecommute.
I am all for ruining the office so badly that we no longer regard meat based presence as mandatory, but I wish it could happen faster, rather than the phased "lets ruin everything every 3 years" approach.