

no, it’s not dangerous. the website linked in the OP is misconfigured and never replaced/removed the placeholders.
EDIT: clarified that the website linked in the OP is the culprit, not OP themself. you can find the intended image here: https://radicle.dev/assets/images/og-card.png










copying what i wrote to here:
radicle.dev has a misconfigured sharing thumbnail. the reason you get the Local Network Access warning on both the post and the user’s profile is because their post is visible from both pages, and it tries to load the thumbnail which is addressed to
localhost.