worked on a number of sites where similar to the above has gone down.
one set of sparkies got booted off site so had a mad 20 minute dash round cutting out everything they had installed over the last few months.
another set (not sure which trade – different site) unbolted a load of scaffolding supports on their way out and sent an innocent lad crashing down 3 stories or so and straight into casualty.
diff guys again (and diff site) got pissed off with a fella (think he was some kind of building control man or maybe a manufacturer – was very picky and would regularly come down and make them redo anything with the slightest issue)…
anyway, while he was on a diff bit of site they hopped up to his car in the multistorey opposite and built a rather neat U-shaped breeze block wall all the way around the back of it. then went home.