I just noticed the tag code-review-practice. I don't quite understand what the purpose of it is on a SE site which is all about Code Review.
Agreed -- I checked most of them and they were just plain code reviews, the "ambient" tag you'd expect every question on this site to have simply because it exists here!
That's the very definition of unnecessary...
So, I migrated one about the practice of code review to programmers, and I destroyed the tag elsewhere.