Vine, the Twitter owned company, has taken measures against the small percentage of people that are using the service to publish pornographic content. Clips containing nudity, sex, use of sex toys etc. are hereby banned, although artistic nudity is still allowed.
"For more than 99 percent of our users, this doesn't really change anything. For the rest: we don't have a problem with explicit sexual content on the Internet -- we just prefer not to be the source of it."