http://www.scarymommy.com/x-plan-tex...bad-situation/If his son is in a tough situation he doesn’t want to be in, he simply texts one of his parents the letter “X” and upon receiving it, his mom or dad calls him and tells him they need him to come home ASAP. It allows the kid to bail with a bulletproof excuse – his parents are lame! – without raising an eyebrow. Because if there’s anything more universal to teenagers than peer pressure, it’s uncool parents.
Interesting plan, and I'm sure it could be adapted to other situations outside of just "Peer Pressure"