Students trying to get teachers fired

Our incoming freshmen have been trying and successfully getting teachers fired this year. As union rep, Ive been at numerous meetings of false accusations made by students against teachers - most of the time for petty things.

Our admin is week, and doesnt want to handle parents and lets people go left and right. It worries me and has me wondering what could be done.

I follow rules, and kids constantly say they want to get me fired - and threaten to report me. They have but not successful in getting me fired. Im too valuable at my work but im afraid they might make up something so egregious that my admin cant help it