Painfully wrong. A magazine is a publication, which hires journalists to write for them. They have an editorial staff that is responsable for supervising everything published by them.
Twitter is a communication tool, that makes itself available for people to post their own thoughts on. It did not hire any of the people who posted incorrect news on it. It's nothing close to a magazine.
Peoppe can scam, lie, plan riots, harass and all that you are complaining about through the telephone or mail too. Should the telephone company be held responsable for what people say through their phone lines? Should mail?
Yes, people do shitty things. But we can't baby-safe the whole world. Its up to people themselves to take the responsability of not lying, scamming, etc, and everyone else's responsability to have some scrutiny over what they read.
The world is not a kindergarden, and grown adults aren't children, nor do I want big companies or governments to take it uppon themselves to decide what is and what isn't wrong, too dangerous, unsafe, etc. They don't have mine or your best interest in mind. Don't ask them to run your life. Its short sighted. You will lose a lot of power in the name of safety, and chances are you still won't have your safety in the end.