Despite the disclaimer, some were inspired by actual cases
Can you name some that come to your mind?
The one where Monica Keena plays a girl who is raped by two of her classmates (who also videotaped it and sold it as "proof" of their sexual encounters for their clique at school, they slept with girls for "points"), was very similar to story I read in a magazine a few years previously.
The child abuse/murder story where at the end, the producers claimed that it was not based on the Lisa Steinberg case, despite the similarities.
"The Serpent's Tooth" from Season 1. Much of the episode seems inspired by the Menendez brothers case (and the info that was available about it at the time). Two brothers emerge as the suspects of the murder of their successful parents, but later it was revealed that the Russian mafia was behind the murders. In the beginning of the actual case, the mob was suspected.
This particular episode is from Law & Order: Special Victims Unit, where twins discover that the girl twin was actually born male and some evil doctor recommended to the parents allow him to perform surgery and raise one of twins as a girl.
Any other contributions?