I've been looking at some of our questions and how they appear in Google, and I noticed that the tag that is prepended to every question title is pretty much always useless to a user seeing it in Google.
We have certainly significant tagging problems, our scope is extremely broad and we haven't found a good tagging scheme yet. But I would argue that even if our tagging was much better, due to the nature of our site it still wouldn't make sense to prepend a tag to the title.
Our tags are purely organizational, they try to divide the questions into broad topics. They almost never add any information to the title, like e.g. python would do on SO if you don't mention the programming language in your title.
Our titles can stand on their own, I don't think we need the tags added to them. So, similar how on Gaming the tag count was increased to 2, I think we should decrease it here on Skeptics to 0.
If you find any counter examples that would get worse after this proposed change, please post them here.
I went through the top search queries that result in people finding this site and I did not find a single one where the tag appended to the question title was part of the search terms. This might be important for SEO on StackOverflow or e.g. Gaming, but it doesn't seem to have any positive effect on this site. We don't have any important terms that we leave out of the title because they're in a tag already, like the programming language on SO or the game name on Gaming.
Here are some examples where the tag directly hurts the Google search results:
Those are all examples where part of the question is cut off due to the length, the tag is taking away precious space from the real title. And none of the tags actually contribute anything useful to the title.
The third example is an exception as for some reason Google doesn't pick up the tag in the title, but if it would it would cut off even more of the title than without the tag.
Another aspect that bothers me is that due to our problematic tagging in general, the tags that appear in the title often don't make all that much sense out of context. This gives the impression that a somewhat related, but a bit random word is added to the title, which is something I associate with content farms and other SEO spammers.