-noun technology.

The reasonable fear that one might post an item,  photograph,  statement, or criticism on a website involved in social media that one might later regret,  but cannot delete or retrieve,  resulting in considerable angst and/or embarrassment.

Malpostaphobia can be overcome by practicing think before you type philosophies similar to the stay away from the reply all key mantra.

Please check out the following for knowledge regarding social media mistake avoidance:

Social media mistakes, no-no’s, failures or bad ideas

Six common online missteps to avoid.

Common social media mistakes

What not to do- 10 Social Media Mistakes

………..and a few positive ideas.