These assholes are smiling. That's what's wrong. Have these people ever even moved?! You know what happens when you move? You hate people. You hate anyone. You especially hate people that are having fun.
Yesterday I had to move a new couch in and take an old couch out of my dad's office to put in my apartment. By myself. Luckily it was only a 'love seat' and not a full size couch, but it was still a heavy leather couch nonetheless. Nothing makes you want to hit someone like moving furniture. People just don't seem to understand that it's no time to joke. That's real life happening.
ps - If you ever need to move and you have some extra money, pay someone else to do it. As much as it sucks to move, it is conversely awesome to watch other people move your shit.