Okay this is the whole story of my friend and his younger sib
I would like to point out that I'm not trying to disprove what you said but rather, say why the situation became how it did..
My (former) friend who plays TF2, like me, has a younger sibling. He (being more mature and not as "exposed" to self-esteem issues) allowed his younger sib to play. I have no idea where he got the idea from, to let his younger sib to play, but he did it anyway. He frequents a server and allowed his younger sib to play on said server. That's when the trouble began.
He had a mike so he could say what he wanted to say, however, once he said something, everyone on the server actually did what some of us would do....initiate a votekick, and just like us, the kick did not pass through.
At this point, everyone started to talk smack about him. Sure he could've just muted them but he didn't know how to work the main menu. He could've also left, but as stated before, he did not know how to work the controls.
Not to mention he is a complete noob to how a computer works other than the default TF2 controls, so he couldn't have just turned off the power or turn off the speakers. People then started to talk about him, make fun of him, and other unmentionable things.
The next day, he was checked into the hospital
His brother actually recorded everything that happened that day using Fraps.
He showed me this video, I said why he would do that, and he said "I had no idea that something this funny would happen!" I promptly smacked punched him in his face and walked off.