Question

What can you do to protect your self from social media abuse
PsyDAG
Stay off social media and/or report the abuse. The best way to report abusive content or spam on Facebook is by using the Report link near the content itself. The same with other media.
PsyDAG
By the way, what does your question have to do with "Maths And Sciences"?
Trip
Just stay off it and don't engage with others you don't know.