This edition of Stupid Criminals is a lesson on what NOT to do to get back at an ex.

According to Seattle Post-Intelligencer, 26-year-old Zachary Milliren from Lake City, Washington knew his ex-girlfriend was flying from Seattle to Las Vegas on a Southwest flight on Wednesday morning.

So he called the airport with a bomb threat, just for that flight, to try to get it delayed.

The police cleared all the passengers off the plane, took them back through security, and swept the plane for bombs.  Everyone checked out clean and the flight left less than two hours late.

Meanwhile, the cops easily traced the bomb threat to Milliren, and he was arrested for making a bomb threat and felony harassment.

Whats the worst thing you have done to mess with an ex? Let us know in the comments below.