This is one of the stories where things go bad due to events which don't make sense. Events caused by mistakes which nobody with a fraction of a working...
You can tag anything on ModDB on ModDB, and all tags can be voted up/down by the community depending on their relevance.
Official tags, as well as up-voted tags will appear higher in the list as they are deemed the most relevant.
If you discover a page that does not have any tags applied, why not help out the community by submitting tags, or posting a comment with #tags in it, which will be automatically linked.