Advertising in social media has many benefits but is there any disadvantage for ads on social media?

It comes down to the management, meaning if they chose not to go with outsourcing and they have an unqualified staff handling their social media brand, campaign and user engagement, things can get nasty, But I can't really think of any disadvantages for ads on social media persay, check the following article, it explains briefly what can go wrong with social ads: http://smallbusiness.chron.com/disadvantages-advertising-social-media-18746.html