The danger of being mad or mean online 24/7 is that it'd become your sole personality and consume your heart without realising whats actually important to use your rage for. This little thought was brought to you by reading an obnoxious as hell slate article and just calling it that, obnoxious and wrong as hell.
I used to be ruder online when i was younger because I didnt like people being "wrong" or saying bullshit or doing things i personally disapproved of. And even if I still get annoyed by those things I don't want it to become something to write home about or that consumes me even if sometimes it does. I just complain to my gf or think it's inane and do something else. Like in a way being a hater sucks Not bc I dislike something but because it's a waste of my time.
But also falling into complacency or into the noncommital disaffected guy persona is dangerous too. Always give a damn but make sure you're using all of that damn in something you care about and not just spreading it around like styrofoam balls. I'm still a huge complainer though.