I’ve not heard taking keys done as a strike action before but I love it.

“taken the keys to hundreds of vehicles”.

Look! Actual action that has disruptive tangible consequences!! That’s how it’s done.

Now have every failed negotiation end in random components going missing from random vehicles.

“Oh it’s not theft, they’re on premises. We’re just really bad about remembering where we put what…gee I sure hope you came prepared with a generous contract!”