clipped from: snafu-ed.blogspot.com   
As obvious as something like this might seem, the local Humane Society in the San Antonio, Texas area is having to warn people to not try to neuter their pets with a rubber band.

Riley (pictured) was sent to the emergency room at the Humane Society. It's believed his owner tried to neuter him with a rubber band. Be glad I didn't post a photo with the painful part of Riley's body pictured.

Unfortunately, Riley's owner isn't the only one who thinks you can neuter pets this way, as there was a Yahoo! Answers question about the subject, with the questioner basically being called a moron by the respondents, much as Riley's owner most likely is.