Why don't you just strip the tags off and let the tag die by itself. I have [tag-removed] blocked, so won't your approach make all of those questions invisible to me?

Because that bumps the questions to the top of the home page.

I'll go with the solution Jonas proposed, but I reserve the right to merge unwanted tags into [tag-removed]. Rather than blocking this tag, you should simply remove it from the question whenever you see it at the top of the home page. If a question is really awful (and hence doesn't have any other tags at all, so you can't remove [tag-removed]), then it won't ever get bumped because everybody will ignore it, so you won't see it anyway. I don't see any reason to have [tag-removed] in your ignored list.

@Mark, I found that page helpful from time to time, but it doesn't seem to match common usage. For example, I've seen the tag [mg.metric-geometry] deleted and replaced by [discrete-geometry] when the latter is listed under math.MG. I honestly don't know enough about MG to determine what's right and what's wrong, but this particular tag has been very puzzling to me.

btw, if you have enough rep to vote on meta.SE, please vote up Scott's request to extend the character limit on tags if you haven't already done so.

I agree that many of the analysis and differential-equations tags should be replaced. Let me know if there are any tag merges that need a moderator, but it seems unfortunately that this requires by-hand attention.