I find it surprising they take all those xbox live messages seriously.
I personally have my very own theory about harassment on Xbox Live.
The reason why people are harassing others:
As pretty much everywhere on the internet, Xbox Live is a place where everything you say is linked to your online persona and real-life consequences usually don't exist. I think there should be studies on why people act differently when they don't have to expect any kind of punishment for their actions.
How they pick their victims:
Depending on the situation the victim will either be the 1 vs 1 opponent (1vs1 in an FPS or Dark Souls or something) or a specific person in a group of people (online lobby). Picking the receiver in a 1 versus 1 situation is not hard. It's “the other person”. Picking a victim in other situations is more complicated so they stick to people that stick out. Usually the person sticking out isn't the 24 year-old male so when he gets harassed in an online game then it might be because during gameplay he was seen in a 1 vs 1 situation as described above (that's how the target audience gamer became the victim).
If there's someone else who sticks out then they will be chosen as the victim. A 8-year old sounding person in the lobby sticks out, so do females so that's why these people have a higher chance of being harassed than others.
I've noticed this when I was features user on Xbox once. The messages started popping in simply because I was the one person that showed up right in front of their face.
How they're being harassed:
Depending on who people harass they also change the kind of harassment. Target group males will be called faggots or something like that, because that's either the go-to insult for the person insulting or something they hope will get a reaction from the receiver of the message.
Females will be harassed with what people consider to be sexist messages. People want their harassment to mean something and so (just like when they harass males) they stick to a couple of go-to phrases and insults. Not because they're sexist, homophobic or anything but because these are insults that have (in the past) shown to be effective ways of insulting others.
FIN.