The Payday 2 anti-cheat is client-side . If you host a lobby, you will never see your own cheater tag. You need a friend to join you, or you need to join a public lobby to see if the pink text appears.
The PAYDAY 2 anti-cheat does not typically detect standard HUD mods (like WolfHUD) or visual-only mods. It is designed to flag actions that give an unfair advantage or bypass monetization. Common triggers include:
Stay clean, heisters.
"Much," Wolf said, checking his magazines. "Now let's do this the hard way."