Couldn't tell about the security or LEO, but even if,...wannabe, psuedo mall ninja, tells me I'm going to be arrested on any charge "he wants to"? For a poster?
Call the real Sheriff's.
They can always ask you to leave school grounds which is BS, but "arrest"

That's bogus.
Trying to get all the perspectives, as I received my 2009 TRIM, "Property Tax" Statement from my county, and Florida...
My house value went down, but the proposed taxes next year are higher.

,..across the board...
All the County Comm. and School Board Meetings, (which can and do levy taxes), town hall meetings are in two weeks....
I may need to not take any posters, if I have to deal with this BS....