Questionable quality, questionable decisions, or stories that just plain get on my nerves due to inconsistencies, stupid characters, or any other number of reasons but have the potential to be some of the best. All stories here awaiting reassignment to Tracking or Garbage Dump pending new information.
If I see this tag on a story, I know I've read it already to some extent and either its poor writing, stupid characters, brain-dead plot, or any other factor has caused me to avoid it like the plague. You really have to be trying to end up in this garbage heap and not in Quarantine.