Some rich girl with lawyer parents accused me of making a death threat. I was suspended for a day.
Schools don't give a shit, they are so damn paranoid that any accusation is true and any mention of the word "gun" or "knife" is immediately disciplined.
Sometimes I feel like it's a self fulfilling prophecy. The stereotypical weird quiet kid gets bullied for being a "school shooter", the school either disciplines him or treats him like one (checking their bag every morning and snooping through their phone and online activity) and the kid is totally isolated because there's zero sympathy for him. Everyone bullies him and the school treats him as a threat. You can only pressure a being so much before they lash out.
I would know cause that was pretty much me until I dropped out.