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Oh really? Maybe be has caterpillar aversion? 
Pre-caterpillar, I think? I don't really know. But all the power to him, frankly; you can block who you like, it's just such an uncommon thing to occur to me that I find it a bit funny to see him up on this particular high horse
Could be you're in one of those ideological twitter block-lists that have become popular.
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