I'm just middle aged and lost all energy for unproductive discussions. The second another poster posts something genuinely hostile, like "touch grass" kinda shit, I'm just done talking. Also if we're six comments in and the other guy won't even admit to being wrong to the thing he said on comment one, despite me doing twenty minutes of research to prove conclusively that he's wrong, I don't want to waste another second of my life on him.
I gotta have 10% of the "disengage" comments on this site.
Nope. Never too early, if you know you're dealing with some peckerwood smuggard what won't be turfed out, it's easier to just shut their shit down from the jump. "No, I'm not interested in discoursing with you, go away."