You know, when you make up numbers (or misrepresent them) it tends to cut into your credibility.
These numbers are from the National Center for Education Statistics
2011/12
3,172,403 suspended 111,018 expelled
2013/14 (Most recent compiled)
2,635,743 suspended 111,215 expelled
Thanks, I must have gotten my 2.6 million from this site and accidentally mixed up suspended with expelled.
The point remains, kids get suspended for bad behavior. If you are suspending 2.6 million a year then you can be sure there are 2.6 million write ups for bad behavior. In NYC the chancellor's regulations do not allow you to suspend someone on the first infraction and almost certainly not on the second either (with the obvious exception of a felony).
The question was that schools are "hiding" information about kids. It is true that schools do their best to get felonies downgraded and will lean on teachers to not require an assault to be labeled a felony. However, you are much less likely to put that much pressure to prevent a suspension. in my experience in Brooklyn kids got suspended frequently, generally for fighting or for deviant behavior. Unless you were the teacher making the report you wouldn't know about the reason, but you would know that this kid or that kid had been suspended and you needed to give them work to do while on suspension.
The Parkland shooting was from a kid who was expelled the previous year. Since as you have quoted 111,215 kids were expelled last year that means he represents less than 0.001% of students expelled. It should be obvious that it is common for a small percent of these kids to get suspended, let's say less than 10% over the course of their four years in high school, yet less than 4% of those kids wind up getting expelled. So these are some very bad behavior, perhaps the worst kid out of 1,000. Even so very, very, very few of them commit mass murder. The idea that one did therefore we should publicize all 111,215 and what their offense was seems like using a bazooka to kill a fly.
Contrary to what you might think these 111,000 are probably guilty of minor infractions. I had a friend who was expelled from his school because he had drugs. James Rubin grew up to to be the Assistant Secretary of State in the Clinton administration and is now married to Christiane Amanpour. Since he is a public figure this is all public information. While teaching in Brooklyn I met gang members, I called them "metrocard attendees" They came to school one day a month to get a free metrocard. No one messed with them and they had no interest in messing with anyone in the school. Those were low level kids. High level gang members would never waste their time for a metrocard. Also a gang member could care less if they were expelled.
Anyway my stance is still the same, the rules we have in place at school that protect the personal information of minors is not the reason these kids are shooting the place up. Drugs, broken families, porn, a lockdown and sitting at home on the computer all day, and the use of psychotropic drugs on kids are much bigger issues.