Please reply instead of (or in addition to) tagging the user you're replying to.

Tagging isn't a feature in HN.

It is also not supported, beyond people by sheer luck see their nick.

If I see my points shoot up a bit I check my comment history to see what caused it.

Or running their Claw scraping HN comments periodically for their mentions.

That's true... for the exploit demo that they released. The primitive that underlies the exploit, however -- a page cache write -- can easily bypass the container boundary. One only needs to hook an executable which is also present in the host.