it depends on what's at stake. you can't knock yourself out every time; the litter box has to be changed and one has to stay nourished and hydrated. one has to pick one's battles. how well do i know the person, what is the foolishness in response to if it's a response, to whom is it aimed, what kind of mood am i in, is it a day ending in "y," you know, stuff like that.
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A life Atheist, there’ve been many times I simply couldn’t help myself.. Any more, I observe, listen, watch the expressions on the faces going by … and usually conclude, not only are they hopeless, but doing more damage to ‘their cause’ than I could attempting to rebut it.
I defriend and block all Trump/alt-right people on Facebook and this website.
If someone starts lecturing me about Christianity, I act bored, mumble "Um-hum..that's nice," then LEAVE and never contact them again. Or if they're around, I'm aloof and busy.