Wikipedia:Be bold in updating pages : Be bold when updating pages

Wikis don't work if people aren't bold. You've got to get out there and make those changes, correct that grammar, add those facts, make that language precise, etc. etc. It's okay. It's what everyone expects. So you should never ask, "Why aren't these pages copyedited?" Amazingly, it all works out. It does require some amount of politeness, but it works. You'll see.

If someone writes an inferior or merely humorous article or article stub, or outright patent nonsense, don't worry about their feelings. Correct it, add to it, and if it's a total waste of time, outright replace it with brilliant prose (and relegate the deletions to bad jokes and other deleted nonsense or the corresponding talk page). That's the nature of a WikiWiki, and long live Wikipedia!

For the most part, the instinctive desire of an author to "own" what he has written is counterproductive here, and it is good to shake up that emotional attachment by making sweeping changes at will when it improves the result. And of course, others here will boldly and mercilessly edit what you write. Don't take it personally. They, like all of us, just want to make Wikipedia the best it can be.

See also: how to edit a page, editing policy