I am one of two users with a c++-cli tag badge on Stack Overflow. I think that
- any tag in use on SO is a good candidate for being a valid tag here and
- a badge shows that I properly understand the meaning and scope of the tag
Therefore, I propose that creation of a tag here should, in addition to the current standards for introduction of new tags, be allowed if the user has earned a badge on that tag on any of the other programming-related SE sites (or use the requirement for wiki edits).
I know that it's already been argued that not all tags are appropriate across sites, but I think earning a badge probably demonstrates some level of understanding. And Brian's claim that just requesting a tag in the question will get it added seems not to hold true.