I think it depends. If it's just 4Chan style trolling from a stranger then that's not something to get bothered about. If it's just an argument that's spilled online then let it fizzle out. If it's something which does leak into your personal lives (like people at work starting hate groups about you and spreading personal details and pictures) then someone should step in.
Case by case basis, there is an element of 'Man Up' but if someone searches you online if they're hiring you and they find a massive hate group full of lies then that could affect your job prospects.
Case by case basis, there is an element of 'Man Up' but if someone searches you online if they're hiring you and they find a massive hate group full of lies then that could affect your job prospects.