It completely goes against the spirit of teamwork and, well, co-operation that co-op games are supposed to be based on. With the Stop the Cheaters mod, you can make those pesky cheaters’ days just a little bit harder by forcing them to play the game at half-speed. The mod works on flagged players and can be toggled on and off. It’s tremendously satisfying to see the frustration of those players looking to compromise the integrity of your game. There really is nothing more painful than hearing your friends going on about how much fun Payday 2 is and buying a copy so that you can join them on your next heist, only to find out that it lags horribly on your PC. Low framerates are bad enough in single-player games, but they can make time-sensitive co-op games like this one unplayable. Nobody wants a slow responder in their crew.
The Less Effects Mod, in brief, reduces the number of special effects in the game in order to improve the framerate.