User blog comment:DaNASCAT/Technical Update: September 9, 2015/@comment-24746167-20150910120012/@comment-126761-20150910141313

Autoplaying audio is certainly a divisive topic - while we certainly discourage it, we've never had a strict "not allowed" policy. I couldn't say whether that's a policy we would introduce in the future - but if we don't 'ban' it, directly adding support for it is something that would require careful consideration.