A lot of open source software literally come with "it's what it is" clause in the license, meaning that the maintainer has ZERO responsibility towards you, the user.

There's a loophole in that scenario, which is created by the fact that in FLOSS there is no clear distinction between users and mantainers. Meaning, the whole concept of FLOSS is based on community modifying and redistributing their own contributions, as a form of giving back to the community.

The same principle applies to wikis. You can take it or leave it, but the whole notion of a wiki lies on your ability to make it your own.