An adult caught in possession of a knife has been fined just £1.
Campaigners condemned Ministry of Justice statistics which showed more than 1,000 offenders in England and Wales were given fines for carrying a knife in a single year.
Fines were dished out to one in 20 knife carriers sentenced in 2007.
The £1 fine was handed out in 2004, while last year offenders were fined as little as £10.
Liberal Democrat home affairs spokesman Chris Huhne accused the Government of "posturing" on knife crime penalties while an anti-crime charity described the punishments as a "slap in the face".
Mr Huhne said: "There is a massive disparity between what the Government say and what the court system does. If we are serious about tackling knife crime, then we must send a strong message to knife carriers. These pitiful fines do not do that. The Liberal Democrats want to see justice being done, not tough talk that is just empty words."
Lyn Costello, from Mothers Against Murder and Aggression, said: "It's disgusting. People ask 'who's to blame' and in this situation we have to blame the courts. If £1 is what they think is a sensible fine it's ridiculous - it's making the whole justice system a laughing stock."
She said a message needed to be sent out to young people that they would be severely punished for breaking the law and claimed anyone who said they carried a knife for protection was lying. "The truth is they carry knives to intimidate, to rob people and for all the wrong reasons," she said.
The figures, which were revealed in answers to written Parliamentary questions, showed 21,350 adults were given a caution or sentence for carrying a bladed weapon in 2007. A total of 1,187 offenders were given fines, averaging £156.
A spokesman for the Ministry of Justice said: "Carrying a knife is a serious offence, and the Government is determined that those who are caught with a knife face the consequences."
