A pet peeve of mine is sites that block the W3C Link Checker. GitHub does this, preventing me from using the Link Checker on my documentation sites that link to

A pet peeve of mine is sites that block the W3C Link Checker. GitHub does this, preventing me from using the Link Checker on my documentation sites that link to GitHub projects and files... I'm not even trying to read their files at all, just to check whether my link is 404. Good on W3C for respecting standards, but this means I just have to copy every one of those links from the report into my address bar, like a robot, to check them...