(adsbygoogle = window.adsbygoogle || []).push({}); I have only got 1 ps3 that is jailbroken, that is running rebug firmware,that I have just received yesterday and I was wondering, the chances of getting banned just by modding old games online for example Cod4, doing mods on private matches, Will I be okay running it my CFW/jailbroken ps3? will I be safe?

It's not that likely that you will get banned for Cod4. I host Hawkin's Zombieland all the time and haven't gotten banned.

Just don't use homebrew online or mod BO & BO2.
Then you will be safe.