When are question tags irrelevant and should be removed?

Question

A question can only have a max of 5 tags. Does it make sense to always go by "the more tags the better" even when some of chosen tags are:

• barely related to the subject;
• extremely detailed
• very unpopular (0 followers).
• and question already has 1 or more tags which describe it well?

I'm talking about situations when question has 1 or more well-suited tags, and the rest don't have a real purpose (in my opinion).

Examples:

Fixed panels while scrolling on a centered design This css related question has fixed tag. Should this tag be removed from the question? Technically, a tag could be created for each css attribute, each php function... See where I'm going?

Another example would be mysql_real_escape_string tag for php/mysql related question.

error tag. How can this tag be useful? It doesn't tell anything.

css3-transitions-not-working-on-button css-transitions tag used here. Should it be kept or removed?

In all situations mentioned above, I would opt for removing the bolded tag. But maybe my understanding of tagging questions is wrong.

I found a similar question (should-imprecise-tags-be-removed), but it's not as detailed as I'd wish.

Shed some light/share your thoughts :)

Answer 1

Improper tagging usually falls under:

1. Unnecessary, extraneous tags (like error on the MySQL question).
2. Improper tag due to shared nomenclature (your fixed example or canvas on a WPF question).
3. "Meta" tags.

Extraneous tags should be removed, improper tags should be removed, and "meta" tags should be removed.

Now in the case of css-transitions, it may be worthwhile letting it ride to see if enough questions pop up regarding CSS Transitions.