Oh, like a computer can recognize sarcasm
Algorithm recognizes sarcasm with an accuracy rate of 80 percent
http://www.msnbc.msn.com/id/37383671/ns/technology_and_science-innovation/
This was particularly funny:
"Tsur's attempt to program a sarcasm detector started as a joke.
When he was a University freshman, he received an e-mail that thanked him for his previous contributions to an annual conference and asked him to be that year's program chair. The email was clearly intended for someone else, but Tsur thought it was funny, so he responded with what he thought was an obviously sarcastic tone. His reply was taken seriously.
"They allowed me to postpone the deadline for submission and asked me what I was working on," Tsur said. "I wrote back that I was working on detecting irony in email. They didn't get that either.""