I've been seeing so many 12 year olds posting "I'm gonna be getting online" or just flat out saying "I can get online HAHA that's not how you do it."
For example, on DemonDylan's post about editing the Xam to get online (which is how it's done as Xam holds the security checks) there were members posting that they get online without doing that. There are specific checks in the rebooter that flag KVs, check for unsigned code, and many other things that are implemented by MS to keep JTAGs offline.
And for people saying that there's not KV needed- you're an idiot! Every Xbox needs a KV, it's just like the name says "keyvault", it's the key that allows an Xbox online, so yes there has to be one. These hosters online are not working miracles, they have just figured out how to reverse engineer a Nand image to bypass Microsoft's security and gain online access. Everything that flags an Xbox (besides DVD drive but that can be overcome also) is inside the nand image and is checked before the console can go online, so common sense says removing or telling the console to overlook these would be the way to go but people would rather make ways to look like they have online access or try burning isos with devkits (LOL people thought this was how lobbies were hosted).
And they don't host on Black Ops anymore not because they can't but they shouldn't.
Happy modding!