Sure, and HN hosts many threads where people debate these points. We're not against that and often as not agree with them.

But this is a startup launch thread about something unrelated, and hounding someone about an ex-employer is a tenuous ground for bringing such material up. It's the sort of thing this guideline (from https://news.ycombinator.com/newsguidelines.html) asks people not to do, even apart from the personal aspect:

"Eschew flamebait. Avoid generic tangents."

More about that here in case helpful: https://news.ycombinator.com/item?id=48750103