Had more than 100 hours in BO3 (got to 55 level) and never got any ban. Well, i just got one ban and was from Destiny but was my fault (account ban from their server not PSN), using DLC's and all. Never got IDPS ban. For eg. i don't mess with stats, never used mods like aimbots and so... When i tried some mods was just like no recoil and UAV. Never used redboxes in any COD game.
I know AW and BO3 are harder to use mods cause of their protection system, but never used mods in any of these 2 and i never got banned when i used to play AW or BO3. So i dunno what or why are people being banned for. I used only PSNPatch (always latest version) to disable CFW syscalls and clear the logs. That's about it. So far, never got bans (and i played alot of GTA V, BF3, BF4, COD MW, MW2, MW3, BO, BO1 and GHOSTS, plus others like DESTINY).
Oh btw, i changed my mac/idps since day one (in 3.55) so if i got a ban, i wouldn't lose the original MAC and IDPS (you know, if i planned to sell the console to someone i could restore it to its original state if the person didn't wanted the PS3 modded). But since i never got any ban...so it's all good and still the same system since 2009 (2k slim) and i do have other 2 ps3's (the original model and a 3k)!
I do not encourage people to cheat or use mods online cause i personaly don't like, but for fun with friends in a close lobby thats ok. There's modders and "modders" (those that do it for fun and others for pride or showing off). The ones that just like to show off or do crazy stuff to legit players deserve a good old ban... That's why i like the PS4 multiplayer like it is
This some off topic, but just to clarify that not all people get a instant ban playing on a modded system online, if you do know what you are doing and if you know what you don't need to do. There's no science behind the ban's. Some might say people are lucky that they never got a ban others that never got a ban will say, well i never cheated in a game nor used mods, cause i just like to play the games with friends and what's not.
But even when using tools or apps or plugins to disable cfw syscalls or clearing logs the ban is always present, cause when going online with a exploited system the risk is always there and it the ban can happen at any time sooner or later. The bans are straight forward, if you are caught using unsigned code you are banned (when logged into PSN you use some homebrew or whatsoever), if you are caught or flagged using RTM tools or mods you are flagged for a ban and so on... that's about it (simple words)!