There were 80 threats in Nassau and 32 in Suffolk, compared to the same periods a year earlier, according to law enforcement officials.

Issuing a threat via phone, text, social media or email is a federal crime, punishable by up to five years in prison. "It's a crime, and you have to talk to your children," Blakeman said. "Parenting is a really big important part that plays a role in this," another 18-year-old student said.