Some school districts aren’t wild for the antics of anti-gun campaigner David Hogg.

New York’s Amsterdam School District leaders sent a letter to parents after activists, led by Hogg, announced they would walk out of classes on April 20.

“It’s been just over 2 months,” Hogg tweeted on April 15. “We have walked out of school and now, on 4/20, we walk out everywhere. No matter where you are – if it’s home, school, or work – walk out. Gun violence can happen anywhere at anytime.”

Amsterdam’s letter reads in part, according to CBS 6:

The District does not condone the April 20 walk out and students who choose to leave school on that day, without a valid excuse, will face disciplinary consequences.

“The District cannot condone students walking out of school for any reason. We do, however, realize the benefit of real life opportunities for civic engagement and teachable moments…” the district said in a statement.

Some parents are unhappy students aren’t allowed to skip school to protest.

“It’s their right to peaceful protest they have every right to go through with it despite the threat of disciplinary action,” says Stephen Arpey, whose daughter was disciplined when she refused to stand for the Pledge of Allegiance on President Trump’s Inauguration Day.

A Texas school district promised to suspend students who walked out back in February.

ABC News reported:

A school superintendent near Houston said his district plans to suspend any student who takes part in classroom walkouts as a form of protest over gun violence after last week’s school massacre in Florida.

“Needville ISD will not allow a student demonstration during school hours for any type of protest or awareness,” Superintendent Curtis Rhodes, of Needville, Texas, wrote in a now-deleted Facebook post, threatening a three-day suspension. “Life is all about choices and every choice has a consequence whether it be positive or negative. We will discipline no matter if it is one, fifty, or five hundred students involved.”

“A school is a place to learn and grow educationally, emotionally and morally. A disruption of the school will not be tolerated,” Rhodes said. “Respect yourself, your fellow students and the Needville Independent School District and please understand that we are here for an education and not a political protest.”