Amir and other have worked hard over the past months to bring ORES to Wikidata. The goal is to use machine learning to make it easier to spot potentially bad edits. ORES is now available as a beta feature on Wikidata. Once you have enabled it you can see some edits in recent changes and watchlist will show up in a different color or have a little r in front of them. These edits are judged as potentially bad and should probably get more review. In your preferences you can adjust how harsh ORES should judge. You can also filter your watchlist/recent changes to only show potentially bad edits. Patrolled edits won't be shown as potentially bad.

This should be a huge step towards making it easier to find and fight vandalism on Wikidata.

Cheers
Lydia