What is meta?
- Any Stack Exchange user can ask a question
- The community provides support, votes on ideas, and reports bugs
- Your voice helps shape the way Stack Exchange operates
First, you need a good reason for doing so:
Either way, you can edit the post/add an answer explaining whichever of the above two points is applicable.
Additionally, you may go into the post history, find the declining mod, and @notify them (you can @notify anyone in the post history), asking for removal of the tag. You can alternatively flag, though I personally prefer the previous option.