I can appreciate the desire to highlight these posts, using tags in this manner is called "meta tagging" and we explicitly try to avoid using them on these sites. You can read about the problems of meta tags and how to spot them in this blog post:

[**The Death of Meta Tags**](https://blog.stackoverflow.com/2010/08/the-death-of-meta-tags/)

The justification for avoiding meta tags has held up well over the years. In my experience, those reasons are probably more true than ever.