Currently, Ask Ubuntu is swamped by a lot of poor tags that just refuse to go away. The efforts to get rid of them by both the community and the moderators by manual retagging just doesn't cut it enough. As we try to eradicate them, they keep coming back. This drains the energy of the community members, who could spend this time better on doing more productive tasks on the site.
While blacklisting sounds like a good idea on paper, the amount of the paper work and red tape strongly discourages the moderators. From what I hear, it is, more often than not, a cumbersome task.
To list some of the tags:
Hence, I request the devs to give the mods better tools than what is already available to them to delete poor tags without blacklisting them.