Use BaconBot.
I know you can't get VAC banned from GMOD I am speaking Steam in general
Be an mpgh skid like me
Not sure why you would want to get VAC banned, anyways, use cheatengine on many games be dumb with your hacks, get detected hacks and use them and you will receive a VAC ban quite quickly.
Use 3l33t hacks
use lmaobox or any other detected hack in tf2 fast easy and lots of ban from lots of game
Empty for now
Google baconbot cracked and put the baconbot module the bin folder it bans you after 1-2 years or months. Not sure vac is really useless in GMOD. Or get the deco module.