Given that you aren't the only audience to a response, even someone who recognizes that it's a joke might add a little bit of context about, I don't know, how melting the fastener might contaminate the sample or grinding the fasteners might cause dust and sparks that could also contaminate the sample, so on and so forth.
That all being said, are you okay? Kneejerk responses like that don't usually come from good places.
I think it was fairly clearly a joke, and at least a little bit funny via absurdity, like suggesting nuking it to open it, or wrapping an elastic band around like a tight jar lid.
Not everything you read is serious unless otherwise stated.