In March 2012, scientist and blogger Jonathan Corbett demonstrated the ineffectiveness of full body scanners by publishing a viral video showing how he was able to get a metal box through backscatter x-ray and millimeter wave scanners in two US airports.
In order to punish tree thieves who cut down trees illegally, some cities spray trees with fox urine around Christmas time. It freezes on them and is odorless outdoors, but would stink up your whole house if brought indoors; the smell is “eye-watering.”
The Mosquito alarm was used to repel young people by emitting a high frequency only audible to youngsters. But teenagers set it as a ringtone to avoid being heard by teachers.
Despite their popularity, “scared straight” programs, visits by at-risk youth to adult prisons, where youth hear about the harsh reality of prison life from inmates, are very ineffective at preventing crime. In some cases, they actually encourage criminal activity in the youths who participate in them.