When I was new at this, it was common for construction companies to send in armies of hired goons to violently evict working-class neighbourhoods. They have other tactics too, including leaving threatening graffiti.
In November 2008 I visited one neighbourhood next to a major train station and saw some of the most violent hired goon graffiti I'd ever seen. There's a gallery for it at the location's entry in the LDB
This one says "Danger" followed by a skull and a body that's been decapitated and castrated.
And here's one showing a lynching.
Here oddly is Popeye.
Those look clownish, but they are death threats.
The hired goons continued to harass the local evictees for months, forcing them to fortify themselves inside one building. They built a watchtower on the roof and placed all sorts of accelerants in the building making it dangerous to force entry. When the hired goons tried to raid them they threw things down on them, including molotov cocktails.
So the police decided to get involved. They declared the evictees terrorists, and launched one of the dumbest operations in Korean history. They filled a construction crate with anti-terrorist riot police and lifted it by crane up to the roof.
Things went wrong and the raid sparked a fire, killing five evictees and one cop.
After, the surviving evictees were charged with starting the fire and thrown in jail. The cop who ordered the raid won a National Assembly election and was later put in charge of the national airport corporation. The evictees were all exonerated after the current president was elected. Pundits have argue whether the evictees or the cops should be blamed, but I think a significant amount of blame should be placed on the use of hired goons, and I've used these pictures to back up that claim.