If I were to buy a tshirt for HN, which I might possibly do - I'd want it to show off a message rather than it looking like it could be for anything. This doesn't feel personal to the brand to me – I could buy this anywhere for a number of reasons.
And of all your description of what you want the community to be - do you want it full of snark like your response? Your response was far more 'schoolyard bullying.'
We're adults here, if we can't take critique without crying foul - the internet isn't for us.
(And this is not me attacking, or having a go.)