As far as I can tell, that "Welcome to the Internet" thing is a joke. Purposefully. It's in the Funny section. Yet, what it says is important info, in a way. That's basically how the Internet works, albeit not THAT extreme. I wouldn't consider them the ultimate rules to live by in this world, but if some actually do, I'll just have to play their own game: not care, just ignore them. They've become the joke, taking something so pointless so seriously.
If you think about it, nothing should be taken seriously. Life is short, so it's only right to have as much fun as you can while alive. Maybe for some people, seriousness is fun. But for me, silliness is fun.
The whole "Omnimaga Versus The World" issue is plain silly too, but not the fun kind. Omnimaga not supporting flaming/personal attacks is a good thing, in my opinion. And technically, it supports the first piece of "advice" on the Welcome page, so it should be a good thing in the opinions of "The World" too. This whole thing makes no sense when you think about it and start noticing all the contradictions.
To sum it all up... Everyone needs to take a step back and realize that we all suck and nothing can ever change it