Here are the major signs of an abandoned village.
- Missing league rank
- A lot of resources
- Resource containers appear to be empty
- Resource levels are close to equal
- Both gold mine buckets are full
- There are tombstones all over the place
- There are a lot of obstacles
- No clan
- Builder huts are inactive
- Crossbow is not loaded
- Inferno tower isn't charged
In this picture you can see most of the signs that are needed to identify this village as abandoned.
To get the resources from an abandoned village all that you need to do is to unleash your barbarians and archers on each side and let them pillage away.