A disclaimer like that is probably necessary for them to stay out of trouble in case somebody uploads copyrighted content, etc. Under DMCA and similar laws, a c

A disclaimer like that is probably necessary for them to stay out of trouble in case somebody uploads copyrighted content, etc. Under DMCA and similar laws, a company that "only hosts" other people's content enjoy broad immunities, whereas anything more complicated than that might be just enough to make someone think they could sue the Wikimedia Foundation. Unfortunately, the US of A is a country where being sued is almost as scary as being sued and losing.