Is it possible to add all vanilla Minecraft things to the blacklist without something like this regex functionality? I'd love to achieve this: WTHIT only ever shows up when you're looking at something added by a mod, and if it doesn't know which mod, it shows an unobtrusive "?" icon (or the acronym WTHIT?) to let you know it's missing compatibility for that mod.

You could even add an achievement/advancement for actually finding an item WTHIT can't recognise ;)