Insert Bob Villa joke here. Also, obligatory link to what Burnination is
Saw someone editing this into a question. This is the very definition of a meta tag
The reason meta-tags are a problem is that they do not describe the content of the question. They describe some other aspect of the question, like the author’s skill level, or the author’s motivation for asking it, or generally what “kind” of question it is (poll, how-to, etc.).
Meta-tags are actually a subset of a larger problem that I usually call dependent tags. These are tags that don’t say anything by themselves – you can’t tell what the question is about unless they’re paired with some other tag (or several of them). These tags are a problem because people don’t realize this and will often use that as the question’s only tag.
The problem is that we don't need to know if the house is old or not to answer the question. If you have old wiring/plumbing/walls that can be part of the description of the problem, but there's no need for this in a tag. What defines "old"? What does it refer to? These aren't defined, so people are just using this tag to describe anything not "new", which makes it irrelevant.
A previous request to make "era tags" was rejected: Tag for era of house (not just "old")
Let's burn this [old-house] down.