Students stayed home by the thousands Thursday after a person on Facebook threatened to go on a school shooting rampage.The person, identified by the screen name Christos Fixed Giannis, is the target of a large-scale cyberspace hunt which now involves the TBI and could soon include the FBI.“If we find who did this, they are in a lot of trouble – and I mean a lot of trouble,” said Sheriff Jackie Matheny, whose officers were stationed at area schools Thursday morning.Word of the threat made by the Facebook terrorist began to circulate Wednesday afternoon and spread quickly through social media. The postings were made by the unidentified individual on the Facebook memorial site for Caitlin Talley who was killed last year in an automobile accident. On the site, Giannis made insulting comments about the deceased teen prompting others to respond.