I've never done it and I don't intend to, unless it was called for. There are some people who tag me along with a few other writers, and that doesn't bother me at all. But, I hear you on the huge 100 tag posts. If the topic isn't interesting - I skip it. Seems like a lot of extra work to tag unless there is some way to copy and paste that I don't know of, and I don't care to research, ha!