10 Tips for Teens to Prevent Cyberbullying

#10. Log out of your accounts on public computers: Similar to not sharing your passwords, don't give anyone the slightest chance to pose as you or to share false information. Also, by staying logged in, you run the risk of the bully changing your password and locking you out for a period of time. 

https://www.momsteam.com/health-safety/10-tips-teens-prevent-cyberbullying