Do you think that I deserve to be punished for what I did?

Something very embarrassing happened to me the other day. On Tuesday, at around 4 pm, I had gone over to a public elementary school (the school day there ends at 3:20, so all of the students had already left and gone home) to play on the swings, and after I was done playing on the swings, some faculty/staff members saw me walking around behind the school, and one of them came out and told me that I had to leave, so I left. Then, when I got to the parking lot, another staff member came out, stopped me, and started reprimanding me and telling me that I was trespassing. When he was done reprimanding me, he took a picture of me with his iPhone and told me to dismiss myself, which is what I did. I feel like such a complete idiot…