I see we have more sheeple in this thread than I first thought. The word ask and the word ban are not synonyms. That's all I was pointing out.
If my actions in a school are disruptive, the admin can ask me to leave. If I decline they can have me removed by being placed under arrest(or asking a LEO to do it). If the LEO arrests me, then I have something actionable against the administration. Suppose I am on school property, after having been issued a CC permit(as in this example). We can then take that to court after my arrest, and we will have a jury, or the bench decide if being a CC permit holder is a lawful basis for prohibiting my attendance at a public school, barring any other kind of actions. Meaning, that while I'm on school property I conduct myself as would any other visitor. If the jury says that yes, holding a CC permit while on school grounds is reasonable to be arrested and denied access, then we can take that on up and see if it will be granted cert to the top court eventually.
However, for an administrator to arbitrarily decide who can be on the grounds and who can't based on being issued a piece of paper 'allowing' a constitutionally protected right, is ridiculous, particularly considering that my tax dollars are funding the school and all that work there.
I know, a lot of you will have plenty to say about 'it's for the children'. The first line of the weak minded fascists.
buh-bye.