At college today, I neglected to open the door for some woman. She got angry, and loudly swore at me.

Now, online people say "oh humanity! be kiiiind!!" where was the kindness here? lol... I frankly don't care in hindsight about the incident, neither now or at the time, since social norms say to keep one's cool at all times.

I just want to know why people act differently online to real life, and why they don't warrant severe correction.