User blog comment:Ducksoup/Why Wikia Evolves/@comment-26335203-20150621050201/@comment--20150621084252

Have to agree there. An online/offline system for when people are on would not be a great idea. Privacy is the biggest thing, and sometimes you just want to be able to edit without being bothered by people. If you have a function that shows you're online and not responding at that exact moment to people, then it appears as if you're just ignoring when you're just busy at the moment.