they have 4 security features so it's practically impossible

1) PS3 scans HD if it has been used by any other devices. If it has, it will format itself
2) Blu-ray can't be hacked. Thus, exploits are harder to find
3) The 7th Cell- Checks everything, if one of the security of the ps3 has been breached, it will shut down the system. (no one knows how to shut down the 7th cell)
4) Sony constantly updating