use third-party antihack tools like infistar... and toys like invictus are never undetected...
its what they tell the kids... so they buy their hacker stuff... and get banned right away...
we got almost every hackerkiddie on our servers with their G-E-F and invictus toys...
dont rely on battleye alone to do his job...
use be filters... check the logfiles they create afterwards... and use third-party antihacks...