GP's comment is about inconsistency of the discussion regarding similar things.
The child comment states that; actually, the people complaining tend to be the same people. So they're consistent.
Which actually jives with my understanding. People that are fine with Porn are usually fine with other little rushes', in so far as they aren't harmful outside of themselves.
Gambling without the poverty is: fine.
Enjoying food without the health complications: also fine.
This is a good strategy. There's a trend to frame a comment as a question, as a tactic to disarm the people you disagree with. But the deeper the comments nest, the more likely the discussion will become confused