The presence of Evil Operator APK on a device can lead to:
Sometimes. Offline games with no server validation may stop showing the error, but the mod might crash on later levels.
The search for is a perfect case study of why the Android modding ecosystem is broken. The original modders break the app on purpose to drive traffic to their ad-filled link shorteners. The "fixers" insert malware to make money off your data. And the "fixed fixed" version? That one just steals your identity more efficiently.