Are there any saves where "boom" is a better description than some other related word such as "bomb" or "nuke" or "explosion" or "destroyable" (all of which are in the top 30 most used tags, so are widely used and therefore are presumably the words people tend to associate with saves of this type and will enter when searching for them)?

Tags are more helpful if they describe a save accurately, and if there aren't loads of different tags which all mean the same thing (e.g. "boom" and "bomb" and "nuke" and "explosion" - otherwise which word do you search for to find saves of that type? Some saves might be missing from the results if not all saves of that type have all of those tags.).

Because useless tags should not be placed... more helpful tags should be placed instead.

There are many banned tags, and probably many tags that should be banned but aren't yet.

However, most of the banned tags you would never notice unless you're trying to be offensive. For example: thissuxs, broniesarebutts, youidiotnoob, and assbuttpoofart.

No, there is no automatic banning of tags. However, if they are used a lot, they are more likely to be seen by moderators, which if the tags are offensive or useless will lead to them being banned.

Tags are whatever nonsense people type into the tags box, so phrases/words "exist" in the list of tags if they have ever been added to any save. In the list of tags, there are 2079 pages with 50 tags per page, and approximately 238 pages of them are banned.