The server tag was burninated by Jeff Atwood during the Great Tag Cleanup of 2012.
Since then, it's been recreated nearly every other day by people with enough reputation, but not enough tagging skill. Once created, it'll be used by the clueless a dozen times a day, literally.
It's a horrible tag teetering on the edge of being a meta tag: It can't stand alone, and it can mean something different to different people.
I've been nuking it almost every day for the past three months, and it's getting old. It's time for the blacklist.