I think you already know the answer to this, and you're looking for someone to back you up... Fine - there are two huge issues with these questions:
They don't include the relevant code.
They link to code that isn't necessarily relevant.
Now, #1 is a problem, but it's a problem that could conceivably be fixed fairly easily by an editor if the question or answers were otherwise worthwhile... Except that #2 conspires to make this task impractical. Pasting a whole HTML page into the question doesn't really improve it.
So yeah, these questions suck, and are unlikely to get enough TLC to suck less. The real question is: why do they get answered?
Because it's just so easy. If someone uploads their Java project and links to it, you're probably not gonna download it, unpack it, compile it and debug it. But if they link to a website... Well, shucks - if you can load the page, you're probably already debugging it.
In fact, it's so easy to debug a live webpage, that some folks have even suggested encouraging this for questions that wouldn't otherwise provide it!
It's a real testament to the skill browser tool-makers have employed in their craft. But... It still sucks for future readers, who may eventually find themselves wading through dozens of dead questions. So what can we do?
Give a man a fire, he'll be warm for a day; kill a man with fire...
If it's easy for you to debug, it's easy for the author to debug. If only he knew how... Just think: instead of wasting countless minutes on SO, he could have his answer in seconds - or at least be close enough to ask a fairly specific question.
But why's he gonna do that, if someone's ready and willing to dig through his pile of markup and lay both the problem and the answer at his feet?
So the answer - as I'm sure you knew - is the same today as it is every day: when you see a question like this, vote down, and vote to close using "Questions seeking debugging help...must include desired behaviour...". Linking to a transient website sure sounds pretty close to Joel's "Why is there a car parked outside my house?" example, but regardless of which one you go with, post a comment and tell them, "Hey man - check out this Firebug thing, it'll change your life! Then come back and ask a specific question..."