Its is possible, but is not happening on this forum, because its against the law, and if u see on any forum, that PM's are being read, please report it.
To clarify for people who think good thing that pein87 didn't report the website for braking the law. Reading pm is not against the law unless the data is encrypted,therefore even if pein87 did report us, he'd lose because the PM's are not encrypted. As the law states it is not allowed to hack/decrypt the information if it is encrypted, in other words if we will know your password that is encrypted with any generated code (MD5/Binary or anything else), it will be against the law.