I just couldn't help it, I had to post this little nugget of failure.
On the website of a Danish newspaper - Politiken - they do blogs as well as newsbits (and I mean bits, most of the stuff is just Reuters/AP). On their blogs, comments are of course allowed. So far, so good. Now the problems start when Politiken accept the comments. What they should be doing is check the various fields for meaningful and/or default input. What they are doing is allowing anything that looks remotely meaningful. This leads to beautiful bits of html like the following:
<a class="url" rel="external nofollow" href="http://Website">[name removed]</a>
Failing to check for the default value your own website put into the field is simply pathetic. More pathetic than not checking whether the referenced site is actually a valid domain but not by much.