I noticed that in the question Dermott's Law and Major Moons, revision 4 (edit made by diamond moderator JDługosz) adds science-based to the question. Originally the question was tagged only moons.
While the question is pretty clearly based in science, the science-based tag places restrictions on the answers that can be given (my emphasis):
For questions that require answers based on hard science, not magic or pseudo-science, but do not require scientific citations.
Adding the science-based tag to a question also doesn't really help categorize it; IMO, the original tag moons categorizes this particular question far better. The question is about moons; it's not about science-based.
Unless the OP expressed consent with such an edit, in which case I feel that should have been mentioned in the edit summary (rather than just the boilerplate "edited tags") -- no material to that effect appears visible on the site at present -- should we really be making edits that restrict the type of answers that are acceptable to a question, by adding such tags?
My feeling is no, we shouldn't be making such edits, because they risk changing the intent of the question.
How does the community feel?