You could be VAC safe if your dad was the CEO of VAC
As such, I've heard of rumors. Many of them include:
1. VAC detected hacks 3 times before they ban u - no notice, however
2. "cheat detected" message that for some reason abandons the VAC2 method; it is not stealthy nor prolonged, usually 2-day ban.
3. bans lifted afer 2 years
Normally, the old thinking was 2 weeks to 2 months. Now it's murky.