The Pedestrians Attack Each Other cheat can not be fully turned off and once the game is saved parts of it remain active. If this is the problem you will notice that the Chilli Dog and other cart-vendors will attack CJ or other nearby pedestrians. This problem can be repaired with hmvartak's Oneline Glitch Repair Tool
, which is up and running again so you might want to jump on it quick. The Savegame Editor 3.1.2 can also be used to fix this glitch, but it must be done manually and there isn't much documentation on what to do.