On my MediaWiki site I'm about to set
$wgRawHtml = true;
in order to allow YouTube and other embedded content. However, the manual says (http://www.mediawiki.org/wiki/Manual:$wgRawHtml):
Warning: This is very dangerous on a publicly editable site, so you shouldn't enable it unless you've restricted editing to trusted users only
When it says "very dangerous", what does this mean? Does it for example enable an exploit that would let someone hack into the MediaWiki site? Or does it merely allow Javascript that would allow a malicious person to harm a user's computer if they view the page?
(I'm aware I could use an extension such as http://www.mediawiki.org/wiki/Extension:VideoFlash but that would limit me to embedding stuff from just thoase sites it allows.)