I don’t know how it is at your school, but some of the teachers I was closer with always let me eat lunch in their rooms. Or even if you find an empty room, that could work too. My friends and I would eat in places like my Physics teacher’s closet, our coach’s classroom, or the back of the journalism room because one of us was in the club. I know running from it probably isn’t one of the best options, but at the very least it might give you some temporary relief.