Typing expresses zero emphasis, so for me it is more of a frustration at not getting my point across, or the other side utterly misreading you and only seeing some agression/negativity or passing judgement with so little information. Plus the fact that people love to insult other people without thinking of the consqequences.
My other half constantly gets himself in the shit on here because he fails to express himself correctly or people misread his sentiment, he then spend ages defending it and just embarrasses us all.
I try to stick to technical help or positive comments, but often get dragged in. I feel sure that if we were all in the pub we would hardly ever argue, we would discuss and learn from each other.