Tags are generally useful for sorting and filtering of content.
However, this requires that users read the tag-description what a tag is actually supposed to tag.
Unfortuantely, this is rather often not the case, and we have plenty of mis-tagged puzzles.
Generally, this is not a huge probelm if it occurs from time-to-time and can hence be 'edited into compliance' by anybody, but I've recently noticed a rather abundant mis-use of tags, in particular by newer users just needed 'any' tag for their, hmm, let's diplomatically call them quick-shot puzzles.
Some examples (AKA Beginner's quick-guid to some tags):
A question to find any common property of a (small or tiny) group of items.
A puzzle in which you spot the pattern that links a set of given data items (like numbers, letters, music tunes). Usually, you use your insights into the pattern to find one or more new elements of the set.
Puzzles where the author does not know a better tag.
Puzzles where the genre or solving strategy of the puzzle is not explicitly stated; puzzles where the puzzler must deduce what type of puzzle it is.
Any funny loop-hole trick-question out there.
A puzzle solved through an indirect and creative approach, using reasoning that is not immediately obvious and involving ideas that may not be obtainable only using logic.
So, we are back at fighting wind-mills:
We can (read:should!) edit / DV / close all shabby mis-tagged questions we encounter.
We can (read:have to!) patiently educate new users about "on-topic"/"off-topic" and what PuzzlingSE is about.
We need (read:*sigh*) to ignore unavoidable non-quality-content in order to find good stuff.
But can we do more?
Here comes my suggestion: I think a lot of the (rather unwanted) quick-shot puzzles are mis-tagged simply because new users need to fill in any tag and so they pick the first one potentially 'fitting'. We can never-ever prevent these postings, so maybe we can take advantage of the system and use tags as part of the solution?
Many users comes here and want to post a "a quick funny (trick) question", so why not have a trick-question tag? Yes, we generally don't want those type of postings on site, but we can not eliminate them. Let instead users "red-flag" their own questions right away! This helps to easily place the tag as "ignored-tag" in your own preferences.
We could even put something in the tag-description of the kind of
"Trick-questions are generally not appreciated on site unless they are of exceptional quality. Think twice before posting such content, down-voting is likely."
In a similar manner we could create more such tags which fit most appropriately to the type of questions we generally don't want. I would call this 'class' of tags garbage-collector-tags. Note, that I'm not asking for a tag like low-quality or newby-puzzle etc, but for tags which a beginner would choose himself because it is appropriate to the type of question, even if the question itself is not very appropriated for the site!
Good idea? Bad idea? Other suggestions? Suggestions for such tag names?