[rm -rf /]

honestly if your worried dump all your USBs, hard drives and anything else that has something on it in the garbage far from your house. maybe even a lake.

there are companies that can find everything even after a fresh OS wipe. believe us when we say the data is still there.

Best way to prevent it, is to pyhiscally remove it. and start over.

Im sure at somepoint your transmitted something not securley at some point.

Your best bet is if your into that kinda stuff have a laptop that your never log into anything with your name, address etc on it. like ever.

Dont connect to your internet. Use a neighboors