If it's owned by you and only licensed by HN shouldn't you be the one enforcing it?

> ... a nonexclusive

I.e. this section is talking to additional rights to the content you post to ALSO go to YC, not that YC is guaranteeing it (+friends) will be the only one to hold these rights or will enforce who else should hold the rights to your publicly shared content for you.

There's a more intricate conversation to be had with GDPR and public data on forums in general but that's wholly unrelated to what YC's legal page says and still unlikely to end up in an alarming result.

That said, there are "no scraping" and "commercial use restricted" carve-outs for the content on HN. Which honestly is bullshit.