That's a very bad faith paraphrase of their single comment in this thread:
> For what it's worth, depending on the harms, a sudden total ban is not out of the question as being beneficial to humanity as a whole. It would just be disruptive to enterprise, boo hoo. We don't need to always treat bad actors with kid gloves.
No they aren't! This comment isn't proposing anything!
They are arguing that even total bans should not be dismissed by default, and that there can exist situations “depending on the harms” that justifies a total ban.
And they did not say that in a vacuum, but as an answer to another comment that straight out dismissed total ban as an option.
This comment is in no way advocating for a total ban of PFAS in particular.
For that scenario to be a proposal, the hypothesis of the said scenario should be asserted first. They just said: “should this be a big enough harm to humanity as a whole we should not shy away from a total ban”, but he's not arguing that there is a big enough harm at stake here.
And they aren't even talking specifically about PFAS in this comment in the first place! They're answering, in the abstract, to a commenter that argues against total bans as a matter of principle. All they're saying is “I disagree that we should always dismiss the option of a total ban, there are situations where it is justified”. This isn't a proposal for a total ban of PFAS in any way.
There's no comment from a user called “tehjoker” nor any comments talking about total bans, in this thread.
Also, in another, different, threat, “tehjoker” is also not proposing a total ban, you're reading his comment wrong.
[1]: https://news.ycombinator.com/item?id=39231091