Lobsters has a simple but effective and fairly strongly enforced tag system that makes it far easier to curate your feed than HN. Despite what others have said here, it is not a ghost town at all, it's intentionally lower noise and they'd like to keep it that way.
Roughly 100 tags on the page. I see "news" and "ipv6" marked as no longer active. I'm guessing that "inactive" implies dropping from SQL indexes as an economy measure, while retaining unmodified in the original post's metadata.
> Quite a disciplined policy by the stewards of the website. How does the enforcement work against say, overtagging?
Tags are used as negative signal, rather than positive (as in, you filter out tags you don't like, rather than taking the ones you do), so overtagging would kill the submission, and missing tags will be added by others via suggestions (which automatically add the tag after some threshold amount of suggestions).