I keep reading the following or similar....
'Get a life'
'Get a grip'
'Well if that's all you have to worry about.....'
'You can always switch over/don't have to watch it'
And my personal anti-favourite:
'You're overthinking it' 
I'm not perfect - I sometimes start reading a thread and then decide I can't be arsed any more so I move on and don't leave a comment. I don't decide to tear the poster to shreds on my way out though.
Why on earth do people make these ridiculous, fatuous, completely unhelpful comments? They are just more or less polite ways of saying 'shut up and stop feeling what you're feeling'. Just because you have no empathy and can't wrap your brain around someone else's point of view doesnt mean that they are wrong and have no right to feel how they do. By all means disagree but do it honestly and put some effort into the discussion instead of just brushing people aside.
OK, that was therapeutic. Thank you for reading 