There is a thin line between times when this is true, and times when people are just being obnoxiously pedantic.

Correcting someone's language is always ok as long as it's done respectfully, which it was. I'm sure people that speak English as a second language really appreciate it, otherwise if nobody tells 'em they're using something incorrectly then they're never get to learn!

Yup - I owe my above-average native fluency to my mother's incessant correcting, and my English proficiency to countless kind strangers on the internet.

Just "silicon*" as a reply should have been enough. There was no need for the additional sentence and certainly no need for the source/link.

Even that's not needed, it's just a shitty spelling-only reply when everyone in question knows what's going on - it added nothing to the discussion.