The good new with Wix is they don't claim property on your content :
Wix does not claim any intellectual property rights over the User Content[...]
The bad thing is they refuse "obsene" or "inappropriate" (yes, this is vague)
YOU FURTHER AGREE THAT YOU WILL NOT:[...] (III) SUBMIT MATERIAL THAT IS UNLAWFUL, OBSCENE, DEFAMATORY, LIBELOUS, THREATENING, CHILD PORNOGRAPHY, HARASSING, HATEFUL, RACIALLY OR ETHNICALLY OFFENSIVE, OR ENCOURAGES CONDUCT THAT WOULD BE CONSIDERED A CRIMINAL OFFENSE, GIVE RISE TO CIVIL LIABILITY, VIOLATE ANY LAW, ENCOURAGES USE OF DRUGS OR ALCOHOL, OR IS OTHERWISE INAPPROPRIATE;[...]
Seing this example :
http://ebenedek.wix.com/top10sex, they seem to be quite liberal.
But Wix won't go to the level of control you want, and I don't think any other free website providers will allow this.
With a few bucks per year ($10-$100), you should find this. Probably some advanced free PHP CMS (think eZublish typo3, or Drupal+plugins, Wordpress+plugins) maintained by shared web hosting providers.
