Takes me back to a wonderful bit of industrial action taken by TAA cabin crew in Australia in the early 1980s. They put every carry-on bag through the size guage and on the scales: anything too big or too heavy, they tagged and sent down to the hold. Oh, and they enforced the one carry-on bag per passenger rule as well.
You can imagine the chaos at the boarding gates.
And no, of course it wasn't "industrial action", they were just helping the companies safety record by enforcing the safety rules.
IIRC, whatever their beef was, TAA caved in within a few days.
I have no idea what the dispute was about, or where the rights and wrongs lay, but as an example of playing the company rules against itself, it was brilliant.