This slogan means that remaining anonymous online (using a mask) does not protect someone from the consequences of their actions (not a shield). It emphasizes that hiding one's identity does not make harmful behavior acceptable or untraceable. Anonymity may conceal a person's identity temporarily, but it does not prevent accountability or repercussions for cyberbullying. The phrase suggests that anonymity can give a false sense of security, but ultimately, it does not provide true protection or immunity from consequences.
This is for my class assignment, but I chose to post it to all of y'all, so enjoy!