This isn't a bad idea, nor a great one in my personal opinion. But like all investments, it will work in the long run. I had already thought of creating my own tag for myself, so it won't hurt for me to add the #superman tag to my future posts as well.
I understand that Steemit does encourage the creation of new tags, but hardly any newcomer really decides on creating a new tag since the average newcomer's mind is more on the money than on actual content. I will share this idea with Steem users I know (who also struggle with getting noticed) and hope this system works out in the long run.
We're not doing only ourselves a favour this way, but also doing Steemit a favour in the long run. The more tags there are out there, the more vibrant and active sub-communities will be; more room for growth and improvement.
Upvoted, Replied, and Resteemed :D
Yours Truly,
@interestinggirl
<3
Maybe some hopefuls who were searching for "superman" or "batman" might stumble across our posts in the near future and find out that our posts have decent (if not awesome) content to read. :D