(CNN) Sometimes called "Columbiners," they romanticize and idealize the student killers behind the 1999 mass shooting that claimed 13 lives at Columbine High School in Littleton, Colorado.

Now, 20 years after the massacre, the Jeffco Public Schools district is asking its community whether the high school should be torn down and rebuilt in an effort to temper this subculture of online fans who remain infatuated with the killing and the teenage shooters.

"School shooters refer to and study the Columbine shooting as a macabre source of inspiration and motivation," Jason Glass, district superintendent, said in a letter to the community.

The threats forced the closure of schools in 19 Colorado districts in April before the woman -- 18-year-old Sol Pais -- was found dead from an apparent self-inflicted gunshot wound, authorities said.

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