This article is about one, and only one. My favorite part of the article: "Simply put, recruits can hurt their standing with schools on Twitter."
http://bleacherreport.com/articles/1661423-alabama-ohio-state-target-brandon-harris-eliminates-texas-am-with-class?utm_source=newsletter&utm_medium=newsletter&utm_campaign=recruiting
This was a good "tweet" though. We can rest-assured that he won't pick ohio...