Footage showed the contractor drilling through a wall, but rather than put insulation into the wall via that drilled hole, he simply filled it back-up again.
I'm with ya... but actually, I agree with HerrBeter. It's not a proportionate response unless you make dam sure you're costing him as much in repairs as it cost to get the insulation put in, plus the fuck-around-and-find-out fee.
There are too many responses so I'll write some more here
Else it will be a systematical failure, damages must be paid for and then education to ensure. This part does not have any revenge in it, but instead it is proportionate and he'll be able to continue to contribute to society by paying taxes etc. I'm just translating off the top of my head so it might sound wonky