There have been several examples. Here's one from recently:
https://www.msn.com/en-us/news/politics/family-of-boy-suspen...
> Nine-year-old Ka Mauri Harrison was taking a test virtually when he saw his teacher rush to get his attention after she spotted the BB gun in his room, a New Orleans NBC affiliate WDSU reported.
> Ka Mauri's parents chose to start the school year off remotely, due to the coronavirus pandemic.
> The incident resulted in the fourth grader being expelled from his school. However, his punishment was reduced to a suspension this week.
> Harrison's family called the punishment a mistake, adding that it threatens their son's academic future.
> "This is an injustice. It's a systemic failure," Chelsea Cusimano, the family's attorney, told The Washington Post on Friday. "They're applying on-campus rules to these children, even though they're learning virtually in their own homes."
> The boy's father, Nyron Harrison said, "They are treating it as if he brought a weapon to school," according to The New Orleans Advocate. "They told me he would be facing expulsion."
> Jefferson Parish Schools, a Louisiana school district that includes Ka Mauri's school Woodmere Elementary, told The Hill that it does not comment on individual student records.
> "Regarding discipline, it is our policy that teachers and administrators may employ reasonable disciplinary and corrective measures to maintain order," the district added.
Here's one suspended for liking picture of gun:
https://www.dailymail.co.uk/news/article-4488386/Boy-suspend...
Another one:
https://nypost.com/2019/04/10/students-suspended-over-snapch...
In a country where arms are part of the constitutional rights, students liking picture on social media or having it in the background during a virtual zoom conference is natural. Getting suspended over it is absurd.
Here's another related one. Virginia Tech Women's soccer player Kiersten Hening alleges she got benched for not taking the knee before a soccer match. Now she is suing. Here is a lawyer's breakdown of the lawsuit:
https://youtu.be/kMDN-9HoTbw
https://youtu.be/iPZbygw5PN4