I added the "backuppc" tag to an old question about a specific BackupPC setting here: https://serverfault.com/suggested-edits/5138
This got rejected by user Chris S. What guideline did I violate with this edit? I'm a bit confused...
The Question is over a year and a half old and I didn't feel it needed to be dug up just to add a scarcely used tag. If you really feel it adds value to Server Fault and the Question having that particular tag added, I'll be glad to toss it in there, I just don't see it myself.
Side note: There are no "penalties" or detraction for having a edit rejected. My history shows 422 approved and 81 rejected, so you're not the first by a long shot.