Warning: This video might make you sick.
An alleged Blood member, a student, walks up to the board and makes his classmate erase all the work he has done, on what looks like a very difficult math problem.
Why did he make him erase it? Because he wrote in blue, not red. Not the color of the Bloods.
In the background, you can hear the other students making comments about the blue ink. Meanwhile, no adults bother to intervene.
It is pretty astonishing that these kinds of things happen in schools, and little is done to stop it. Many students have a lot of power over their teachers, which makes schools not what they used to be.