People complaining on Twitter don't have the power to fire/remove anybody. All they can do is spread allegations. If those allegations are true and bad enough that your employers or associates want to disassociate themselves with you, that is your (or your associates') fault, not the whistleblowers'.

Employers don't just fire you because a Twitter mob told them to. They do it because they learned about your bad behavior and no longer have faith in you.

If you don't like being fired: - Don't do stuff your employers will find distasteful - Vote for candidates to end at-will employment and give stronger employee rights