It appears entirely possible to post a link with no actual text, eg: [](https://derpibooru.org/)Perhaps make it so that it sets the link text to be the link itself if the link text is blank?
https://evilsite.com/virus.exe
and masqueraded it like this: [Click here for ponies!](https://evilsite.com/virus.exe)
. Now, instead of just saying “Click here for ponies!” it would look like this: “Click here for ponies! [evilsite.com]”. If the link text is completely empty (or contains only whitespaces), the whole URL could be displayed inside the brackets, so it would be impossible to hide them. Maybe even display a Wikipedia-style “external link” icon after them?Help fund the $15 daily operational cost of Derpibooru - support us financially!