I think that you should be able to flag a tag as inappropriate. Once a certain amount of people flag a tag, then it will be reviewed by a member of the Scratch Team and/or be automatically removed.
I have also seen many tags that don't relate to the project at all, but the owner doesn't remove them. I think that there should be something next to each tag as a way to say that it is not relating to the project. Then, maybe when a lot of people say that the tag is not needed, it will be removed. This way, you will get more accurate results when you search for projects.
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I think that would be a good idea.
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It is true that the tag system is sorely abused. People maybe don't realize that by adding in unrelated and frivolous tags, they are degrading the Search feature and wasting storage space. Maybe a flagging system would help.
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