Now, there are different types of cheats, such as:
1. AIMBOT
2. UNLI CASH
3. LEVEL CHEATS
4. KILL ALL NPC CHEATS.
5. UNLI HEALTH CHEATS.
6. UNLI DEPLOYABLES CHEATS
7. UNLI AMMO CHEATS
And so on, these cheats are VERY common in this game, AIMBOT is a cheat where you headshot every cop you see, it is common in other types of games too (counter strike, TF2....)Unli cash is where you have infinite money and buy anything you want, for cheaters who are poor.LEVEL CHEATS is when cheaters get to the max level (25-100) for cheaters who are lazy.KILL ALL NPC CHEATS, cheaters use this to kill ALL AI (Bots like cops, specials etc....) except your teammates to get like 1000 body counts, UNLI DEPLOYABLES CHEATS, To deploy as much deployables(ammo, medbags, aidkits, etc....) as they can, mashing that G button. UNLI AMMO CHEATS, When people have unli ammo and cant run out of ammo.

How to deal with cheaters, simple steps.
If a cheater joins your game and you are the host
1.Enable autokick cheaters.
2.Report the cheater, provide a description in the report.
3.Report the cheater to overkill, (dont know his email but find it somewhere on the payday 2 forum)
4.Good Job.
If a cheater joins your room and YOU'RE NOT the host.
1.Play with the cheater, observe him.
2.While playing, take pictures.
3.After playing report him on steam and overkill.
4.Easy right?
If the host is the cheater.
1.Follow the steps ^
If you're the cheater.
1.Go to main menu of PAYDAY 2.
2.Click quit game
3.Tell a friend of family to report you.
4.Realize what you've done