if you activate to many things it'll cause a freeze. In the old call of duties it use to kick you from the match with a huge error list. And it will on PC. But on console the error log will not come up it'll cause a freeze for you. Since you are hosting your ps3 is running the whole map, your client, your menu, all the other players connecting etc. Which causes stress for the console, try and not over load the GSC. Or when you get bored of something deactivate it, like landmines once done deactivate it so the script isn't being called and frees up the memory it used for another script to use.