I think that would be complex to implement in a way that would be useful to enough people without getting in the way of everyone else, you are either putting a

I think that would be complex to implement in a way that would be useful to enough people without getting in the way of everyone else, you are either putting a log of load on detecting what content is into the site, or putting that load onto submitters by expecting them to take time to tag things appropriately. And the just isn't enough traffic to make it worthwhile IMO (is scanning a page, or maybe two, of HN to see if anything piques your interest really a chore?). I avoid clicking twitter links generally, Medium too, but the discussion they bring up can be interesting, and often include links to relevant information from less irritating sources, so I wouldn't want them to simply not be here. If you do want fully rid of the links yourself, maybe a userscript is a practical answer? Though if you are a Chrome user that option will be less convenient in future as IIRC Manifest 3 will break options like Tapermonkey (a bookmarklet will still work, assuming you don't mind an extra click).