There are also terms under the category "Southwest border violence" that seem ridiculous, such as heroin, cocaine, methamphetamine, meth lab and drug war.

CNN: The government is reading your tweets

Sudafed contains a key ingredient used by amateur chemists to produce the illegal drug methamphetamine or crystal meth.

FORBES: Losing The War On Meth And Sudafed At The Same Time

Children at Clandestine Methamphetamine Labs: Helping Meth's Youngest Victims, Office for Victims of Crime, June 2003.

WHITEHOUSE: Publications

One of those states, Kentucky, is a living laboratory where researchers recently reported in JAMA on a trend between legal methamphetamine sales and illicit meth lab seizures.

FORBES: Acura Pharmaceuticals Launches Meth-Resistant Pseudoephedrine, Nexafed

If a drug dealer mentioned on his Facebook wall, "Great deal today on heroin and methamphetamine, and it's all organically made in my own meth lab, " I would hope that people would turn that person in -- or at the very least, not "like" his post.

CNN: The government is reading your tweets

Montana has been fighting a methamphetamine epidemic that accounts for 50% of the state's adult incarcerations, says the Montana Meth Project, a Missoula-based nonprofit group founded by billionaire Thomas Siebel.

FORBES: Narcotics