I think it depends on context.
For instance, if you are a leading organizer of a protest and you point to the media and yell to the mob ..."they aren't telling the true story......get them" then you are to some degree responsible for the violence you incited.
If you just say among a group of friends or colleagues in a casual setting......"I can't stand MTG, I wish someone would _________!" And a week later I've if your friends or acquaintances attacked her you bear no responsibility IMO.
I think a lot of this is common sense though.