I'm not offended in the least, now that I know the explanation.
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Without knowing that it was unintentional and part of your software, I just figured it was yet another of the insults being slung in the direction of the flat earthers here. You can't blame me for not knowing the inner workings of your software.
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Now that I know that the sub-sub fora are called "child boards" of their sub-fora I couldn't care less. Sorry for being "thin-skinned" but you might find yourself in the same mindset if you were on the receiving end of nonstop ridicule.
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The flat earthers here are incredibly thoughtful people. I simply cannot say the same of the ball-earth adherents.