My VAC ban story:
I got my account stolen several years ago, and when I finally got it back 1 month later, I was left with a VAC ban from PUBG and serveal hours of PUBG playtime in "Recent Activity". My friend list got wiped and the only one left is someone who apparently “bought” some hack from "me", based on the chat history, so the theif stole my account and was using hack in PUBG to sold those hacks to others, which got my account VAC banned.